Displaying Fault Codes
To display fault codes, stop the engine, turn the ignition switch to position "I", and enable the diagnostic mode with the diagnostic check switch.
If there are no active faults, the stop and warning lamps remain on but do not flash.
However, if active fault codes are present, the ECU begins to display the fault codes.
Before the fault code display begins, the warning lamp turns on; after it turns off, the ECU displays (flashes) the number of the active fault code with the stop lamp (short pauses indicate the end of a digit).
The warning lamp turning on again indicates the start of the display (flashing) of the next number of the active fault code with the stop lamp (function separating the next fault code from the previous one).
The ECU continues displaying the fault code until the user uses the diagnostic switch to switch to the next or previous fault code.
The control system uses three- and four-digit fault codes.
The diagnostic mode remains active until the diagnostic switch is turned off or until the engine is started.
The previous article covered the fault code tables (see the beginning of the article — ISF3.8 Engine Diagnostics).
This article continues the code tables:
686
System: turbocharger shaft speed sensor.
Result: signal differs from the specified one, is intermittent or incorrect.
Conditions for the code to appear: the electronic control unit has detected an incorrect signal from the turbocharger speed sensor.
Effect: no effect on operation; the electronic control unit approximately calculates the turbocharger speed.
Possible fault location:
- turbocharger shaft speed sensor;
- engine wiring;
- electronic control unit power supply or ground;
- electrical devices with strong electromagnetic radiation.
687
System: turbocharger shaft speed sensor.
Result: data below the normal operating range, medium level of limitation.
Conditions for the code to appear: the electronic control unit has detected a low turbocharger shaft speed.
Effect: power reduction; the electronic control unit approximately calculates the turbocharger speed.
Possible fault location:
- turbocharger shaft speed sensor;
- engine wiring;
- electronic control unit.
688
System: engine oil level sensor — data above the normal operating range, high level of limitation.
Conditions for the code to appear: the engine oil level sensor has detected a high engine oil level.
Effect: possible power reduction, excessive smoking, oil deterioration, contamination or serious engine damage; engine performance may decrease.
Possible fault location:
- oil overfill after an oil change;
- fuel leaks into the engine oil;
- coolant leaks into the engine oil.
689
System: crankshaft position sensor — signal differs from the specified one, is intermittent or incorrect.
Conditions for the code to appear: the signal from the crankshaft position sensor has been lost.
Effect: the engine may run rough; difficult starting is possible; the engine runs using the auxiliary position sensor; power reduction.
Possible fault location:
- open or short circuit of the 5 V power wire, signal wire or ground wire in the engine wiring;
- damage or malfunction of the engine speed sensor.
691
System: intake air temperature sensor before the compressor — high level in the circuit.
Conditions for the code to appear: short circuit to power in the circuit of the intake air temperature sensor before the compressor.
Effect: power reduction.
Possible fault location:
- open ground wire in the harness, connectors or sensor;
- open or short to power of the signal wire;
- sensor damage.
692
System: intake air temperature sensor before the compressor — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit of the intake air temperature sensor before the compressor.
Effect: power reduction.
Possible fault location:
- short circuit of the signal wire to ground;
- short circuit to the ground wire or ground of the signal wire in the sensor;
- sensor damage.
693
System: intake air temperature sensor before the compressor — signal differs from the specified one, is intermittent or incorrect.
Conditions for the code to appear: the signal from the intake air temperature sensor before the compressor is too low or too high for the given operating conditions.
Effect: default values of the intake air temperature sensor before the compressor are used for operation.
Possible fault location:
- sensor readings stuck in one range;
- high resistance in the sensor circuit.
697
System: electronic control unit temperature sensor — high level in the circuit.
Conditions for the code to appear: short circuit to power or open circuit of the electronic control unit temperature sensor.
Effect: no effect on operation.
Possible fault location: electronic control unit.
698
System: electronic control unit temperature sensor — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit or open circuit of the electronic control unit temperature sensor.
Effect: no effect on operation.
Possible fault location: electronic control unit.
699
System: electronic control unit temperature sensor — signal differs from the specified one, is intermittent or incorrect.
Conditions for the code to appear: incorrect or unstable data from the electronic control unit temperature sensor.
Effect: no effect on operation.
Possible fault location: electronic control unit.
731
System: crankshaft and camshaft position sensors — misalignment, mechanical system does not respond or cannot be adjusted.
Conditions for the code to appear: the signals from the crankshaft and camshaft position sensors are misaligned.
Effect: engine performance will be reduced; difficult starting and rough idle are possible.
Possible fault location:
- sensor rotor;
- sensor or rotor installation.
778
System: crankshaft and camshaft position sensors — signal differs from the specified one, is intermittent or incorrect.
Conditions for the code to appear: the electronic control unit has detected a loss of signal from the camshaft position sensor.
Effect: the engine may run rough; difficult starting is possible; the engine runs using the main position sensor.
Possible fault location:
- open or short circuit of the 5 V power wire, signal wire or ground wire in the engine wiring;
- damage or malfunction of the camshaft position sensor.
1117
System: deviations with the ignition switch in the ON position — signal differs from the specified one, is intermittent or incorrect.
Conditions for the code to appear: the electronic control unit supply voltage has momentarily dropped below 6.2 V DC, or the electronic control unit does not correctly reduce the voltage (after turning the ignition switch to OFF, battery voltage remains for 30 s).
Effect: minor operational deviations may appear, or the engine stalls, or difficult starting; the following information may be displayed incorrectly: fault codes, trip data and maintenance data.
Possible fault location: electronic control unit power supply.
1228
System: EGR valve electric actuator — signal differs from the specified one, is intermittent or incorrect.
Conditions for the code to appear: unreliable data is coming from the EGR valve position sensor, or the sensor readings do not change during engine operation.
Effect: engine performance will be reduced; the electronic control unit will try to close the EGR valve electric actuator.
Possible fault location:
- intermittent short or open circuit;
- EGR valve position sensor;
- electronic control unit;
- EGR valve stuck or broken.
1239
System: accelerator pedal position sensor (channel No. 2) — high level in the circuit.
Conditions for the code to appear: short circuit to power in the circuit of the accelerator pedal position sensor (channel No. 2).
Effect: serious engine power reduction; limp-home mode.
Possible fault location:
- short circuit to power (12 V or 5 V) of the accelerator pedal position sensor signal wire;
- open ground wire;
- short circuit of the power wire to power;
- accelerator pedal position sensor.
1241
System: accelerator pedal position sensor (channel No. 2) — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit of the accelerator pedal position sensor (channel No. 2).
Effect: serious engine power reduction; limp-home mode.
Possible fault location:
- short circuit of the signal wire to ground or to the ground wire;
- accelerator pedal position sensor;
- open wiring or connector.
1242
System: accelerator pedal position sensors (No. 1 and No. 2) — signal differs from the specified one, is intermittent or incorrect.
Conditions for the code to appear: accelerator pedal position sensors 1 and 2 produce mismatched signals.
Effect: the engine runs at idle only.
Possible fault location:
- accelerator pedal position sensor (No. 1 and No. 2);
- short circuit of the signal wires (channels No. 1 and No. 2).
1668
System: aftertreatment fluid level sensor — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit of the aftertreatment fluid level sensor.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location:
- open or short to ground of the signal wire in the wiring or sensor;
- open or short to ground of the power circuit.
1669
System: aftertreatment fluid level sensor — high level in the circuit.
Conditions for the code to appear: short circuit to power in the circuit of the aftertreatment fluid level sensor.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location:
- open ground wire in the harness, connectors or sensor;
- signal wire shorted to power.
1671
System: aftertreatment fluid level sensor — data below the normal operating range, medium level of limitation.
Conditions for the code to appear: a low aftertreatment fluid level in the tank has been detected.
Effect: no effect on operation.
Possible fault location: low aftertreatment fluid level in the tank.
1673
System: aftertreatment fluid level sensor — data below the normal operating range, high level of limitation.
Conditions for the code to appear: a low aftertreatment fluid level in the tank has been detected.
Effect: aftertreatment fluid is not supplied to the aftertreatment system; instantaneous engine power is reduced.
Possible fault location: no aftertreatment fluid in the tank.
1677
System: aftertreatment fluid temperature sensor — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit of the aftertreatment fluid temperature sensor.
Effect: the specified temperature in the aftertreatment fluid tank is used.
Possible fault location:
- short circuit of the signal wire to ground;
- short circuit to the ground wire or ground of the signal wire.
1678
System: aftertreatment fluid temperature sensor — high level in the circuit.
Conditions for the code to appear: short circuit to power in the circuit of the aftertreatment fluid temperature sensor.
Effect: the specified temperature in the aftertreatment fluid tank is used.
Possible fault location:
- open ground wire in the harness, connectors or sensor;
- open or short to power of the signal wire.
1679
System: aftertreatment fluid temperature sensor — signal differs from the specified one, is intermittent or incorrect.
Conditions for the code to appear: the aftertreatment fluid temperature sensor shows a temperature that is too high or too low and does not correspond to the ambient air temperature.
Effect: the specified aftertreatment fluid temperature is used.
Possible fault location:
- sensor readings stuck in one range;
- wiring damage;
- aftertreatment fluid doser control unit.
1681
System: aftertreatment fluid doser — control unit or component malfunction.
Conditions for the code to appear: an internal error of the aftertreatment fluid doser control unit has been detected.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location: aftertreatment fluid doser control unit.
1682
System: aftertreatment fluid doser control unit inlet lines — condition.
Conditions for the code to appear: the aftertreatment fluid doser cannot ensure correct dosing of the fluid (urea) through the nozzle.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location:
- initialization of the aftertreatment fluid doser control unit at ignition on is impossible;
- urea crystals in the doser obstruct the air passage to the nozzle, and deposits may form in the nozzle itself;
- fluid pressure sensor malfunction;
- poppet valve malfunction;
- doser check valve contamination;
- air ingress through connections or damaged lines;
- doser inlet fitting channel blocked or narrowed.
1683
System: aftertreatment fluid heater — high level in the circuit.
Conditions for the code to appear: short circuit to power in the circuit of the aftertreatment fluid heater.
Effect: no aftertreatment fluid heating.
Possible fault location:
- signal wire not connected to the aftertreatment fluid heater relay;
- ground wire not connected to the aftertreatment fluid heater relay;
- aftertreatment fluid heater relay;
- open circuit in the aftertreatment fluid heater relay circuit;
- heater signal wire shorted to power.
1684
System: aftertreatment fluid heater — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit of the aftertreatment fluid heater.
Effect: no aftertreatment fluid heating.
Possible fault location:
- aftertreatment fluid heater relay short circuit;
- heater signal wire shorted to ground.
1688
System: aftertreatment fluid doser control unit — control unit or component malfunction.
Conditions for the code to appear: an internal error of the aftertreatment fluid control unit has been detected.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location: aftertreatment fluid doser control unit.
1689
System: real-time clock power interruption — signal differs from the specified one, is intermittent or incorrect.
Conditions for the code to appear: no real-time clock power.
Effect: no effect on operation; the data in the electronic control unit do not contain the exact time and date.
Possible fault location:
- backup power battery;
- wiring and connectors.
1694
System: NOx sensor at the aftertreatment system outlet — signal differs from the specified one, is intermittent or incorrect.
Conditions for the code to appear: unreliable data has been received from the sensor at the aftertreatment system outlet.
Effect: the NOx sensor at the aftertreatment system outlet is disabled; engine torque is reduced.
Possible fault location:
- the electronic control unit has determined that the NOx readings are above or below the possible values;
- leaks in the exhaust system;
- NOx sensor installation;
- carbon deposits on the sensor sensing element;
- increased engine oil consumption;
- misfires;
- unsuitable sensor.
1695
System: sensor supply circuit 5 — high level in the circuit.
Conditions for the code to appear: short circuit to power in sensor supply circuit No. 5.
Effect: serious engine power reduction; limp-home mode.
Possible fault location: short circuit to power.
1696
System: sensor supply circuit 5 — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit of sensor supply circuit No. 5.
Effect: serious engine power reduction; limp-home mode.
Possible fault location: short circuit to ground.
1711
System: aftertreatment fluid doser — abnormal refresh rate.
Conditions for the code to appear: communication between the electronic control unit and the aftertreatment fluid doser has been interrupted.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location:
- no power to the aftertreatment fluid doser;
- no ground to the aftertreatment fluid doser;
- open or short in the SAE J1939 data channel;
- aftertreatment fluid doser.
1712
System: aftertreatment fluid heater — data below the normal operating range, medium level of limitation.
Conditions for the code to appear: the heater cannot melt the aftertreatment fluid.
Effect: no effect on operation; the supply of aftertreatment fluid to the aftertreatment system may be cut off if it is frozen.
Possible fault location:
- tank heater control valve remains stuck in the closed position;
- blockage or narrowing of the coolant channel in the tank heater;
- low coolant level;
- tank heater control valve;
- no signal to enable tank heating from the doser control unit.
1713
System: aftertreatment fluid heater — data above the normal operating range, medium level of limitation.
Conditions for the code to appear: the aftertreatment fluid heater is constantly on.
Effect: no effect on operation.
Possible fault location:
- tank heater control valve remains stuck in the open position;
- leaks through the tank heater control valve seat;
- a constant signal to enable tank heating comes from the doser control unit.
1843
System: crankcase pressure sensor — high level in the circuit.
Conditions for the code to appear: short circuit to power in the circuit of the crankcase pressure sensor.
Effect: no effect on operation.
Possible fault location:
- open ground wire in the harness, connectors or sensor;
- signal wire shorted to power.
1844
System: crankcase pressure sensor — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit of the crankcase pressure sensor.
Effect: no effect on operation.
Possible fault location:
- open or short to ground of the signal wire in the wiring or sensor;
- open or short to ground of the power circuit.
1848
System: boost pressure sensor and intake air temperature sensor assembly — abnormal refresh rate.
Conditions for the code to appear: the readings of temperature sensor No. 1 in the intake manifold do not change during engine operation.
Effect: the electronic control unit approximately calculates the intake manifold temperature.
Possible fault location:
- sensor readings stuck in one range;
- high resistance in the sensor circuit.
1852
System: water-in-fuel filter indicator — data above the normal operating range, medium level of limitation.
Conditions for the code to appear: an excessive water level has been detected in the fuel filter.
Effect: no effect on operation.
Possible fault location: water in the fuel filter.
1887
System: NOx sensor at the aftertreatment system outlet — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit of the NOx sensor at the aftertreatment system outlet.
Effect: the engine may not start.
Possible fault location:
- voltage supplied to the NOx sensor below 18 V;
- voltage supplied to the NOx sensor above 32 V;
- NOx sensor;
- NOx sensor heater;
- unsuitable NOx sensor.
1898
System: turbocharger geometry change actuator — out of adjustment limits.
Conditions for the code to appear: when the ignition is turned on, the turbocharger geometry change actuator cannot perform automatic calibration.
Effect: low boost pressure; no open position of the turbine vane actuator.
Possible fault location:
- incorrect installation of the actuator on the turbocharger housing;
- foreign particles may obstruct vane movement when the ignition is turned on.
1911
System: fuel pressure sensor 1 — data above the normal operating range, high level of limitation.
Conditions for the code to appear: the electronic control unit has determined that the pressure in the fuel accumulator is above the specified value.
Effect: no effect, or noise associated with increased injection pressure may occur (especially at idle or under light load), or sudden power reduction may occur due to pressure release by the pressure relief valve.
Possible fault location:
- air in the fuel system;
- fuel filter;
- wiring and connectors;
- fuel pressure sensor No. 1;
- fuel supply control valve;
- high-pressure fuel lines;
- battery.
1938
System: turbocharger geometry change actuator, output signal — data below the normal operating range, medium level of limitation.
Conditions for the code to appear: low voltage has been detected by the turbocharger geometry change actuator.
Effect: no effect on operation.
Possible fault location: voltage at the turbocharger geometry change actuator below 10 V.
1942
System: crankcase pressure sensor — signal differs from the specified one, is intermittent or incorrect.
Conditions for the code to appear: the electronic control unit has detected unreliable data from the crankcase pressure sensor when the ignition is "ON" or during engine operation.
Effect: no effect on operation.
Possible fault location:
- high resistance in the sensor circuit;
- sensor readings stuck in one range;
- sensor installed incorrectly.
1943
System: ambient air density — data below the normal operating range, low level of limitation.
Conditions for the code to appear: engine torque has been reduced because the vehicle is at a high altitude above sea level.
Effect: engine performance may be reduced.
Possible fault location: the vehicle is at a high altitude above sea level.
1962
System: turbocharger geometry change actuator — overheating, data above the normal operating range, low level of limitation.
Conditions for the code to appear: a high internal temperature of the turbocharger geometry change actuator has been detected (above 125° for more than 30 minutes).
Effect: no effect on operation.
Possible fault location:
- turbocharger geometry change actuator temperature above 125° for more than 30 minutes;
- exhaust gas leaks into the turbocharger geometry change actuator.
2182
System: engine brake actuator 1 — high level in the circuit.
Conditions for the code to appear: short circuit to power in the circuit of engine brake actuator 1.
Effect: the engine brake on cylinders No. 1, 2, 3 cannot be activated.
Possible fault location:
- open circuit;
- short circuit to power;
- electronic control unit.
2183
System: engine brake actuator No. 1 — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit of engine brake actuator No. 1.
Effect: the engine brake on cylinders No. 1, 2, 3 cannot be activated.
Possible fault location: short circuit to ground.
2185
System: sensor supply circuit 4 — high voltage.
Conditions for the code to appear: short circuit to power in sensor supply circuit No. 4; high voltage has been detected in the accelerator pedal position sensor power circuit.
Effect: idle only.
Possible fault location: short circuit to power.
2186
System: sensor supply circuit 4 — low voltage.
Conditions for the code to appear: short circuit to the low-voltage circuit of sensor supply circuit 4; low voltage has been detected in the accelerator pedal position sensor power circuit.
Effect: idle only.
Possible fault location: short circuit to ground.
2198
System: turbocharger geometry change actuator — root cause unknown.
Conditions for the code to appear: no communication between the turbocharger geometry change actuator and the electronic control unit; the actuator cannot correctly interpret the J1939 signal from the electronic control unit.
Effect: the turbocharger geometry change actuator is disabled.
Possible fault location:
- Multiplex bus SAE J1939;
- turbocharger geometry change actuator wiring.
2265
System: fuel supply pump — high level in the circuit.
Conditions for the code to appear: short circuit to power or open circuit of the fuel supply pump.
Effect: the engine may be difficult to start.
Possible fault location:
- open circuit;
- short circuit to power.
2266
System: fuel supply pump — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit of the fuel supply pump.
Effect: the engine may be difficult to start.
Possible fault location:
- short circuit to ground;
- fuel freezing;
- fuel supply pump rotor seizure.
2271
System: EGR valve electric actuator — high level in the circuit.
Conditions for the code to appear: short circuit to power in the circuit of the EGR valve position sensor.
Effect: EGR valve position is not taken into account.
Possible fault location:
- open ground circuit;
- signal wire shorted to power;
- EGR valve position sensor;
- electronic control unit.
2272
System: EGR valve electric actuator — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit of the EGR valve position sensor.
Effect: EGR valve position is not taken into account.
Possible fault location:
- open or short to ground of the signal wire;
- open or short to ground of the power wire;
- sensor shorted to ground.
2288
System: turbocharger shaft speed sensor — data above the normal operating range, low level of limitation.
Conditions for the code to appear: the electronic control unit has detected a high turbocharger shaft speed.
Effect: engine power is reduced to lower the turbocharger shaft speed; the electronic control unit has reduced the maximum allowable turbocharger shaft speed.
2311
System: fuel supply control solenoid valve — condition.
Conditions for the code to appear: the resistance of the fuel supply control solenoid valve is too high or too low, or an intermittent communication failure has been detected.
Effect: the engine will run rough with reduced power.
Possible fault location:
- high resistance of the fuel supply control solenoid valve;
- high resistance of the engine wiring;
- terminals of the electronic control unit or the fuel supply control solenoid valve loose, worn or oxidized;
- low resistance of the fuel supply control solenoid valve;
- short circuit to ground of the valve or engine wires.
2321
System: crankshaft position sensor — signal differs from the specified one, is intermittent or incorrect.
Conditions for the code to appear: interruption of the crankshaft position sensor data transmission.
Effect: misfires may occur due to the transition from operation with the main sensor to operation with the auxiliary sensor; power reduction because the engine runs using the auxiliary sensor data.
Possible fault location:
- open or short circuit, poor sensor connection;
- gap between the sensor and rotor too large or too small, or excessive rotor ovality.
2322
System: camshaft position sensor — signal differs from the specified one, is intermittent or incorrect.
Conditions for the code to appear: interruption of the camshaft position sensor data transmission.
Effect: no effect on operation.
Possible fault location:
- open or short circuit, poor sensor connection;
- gap between the sensor and rotor too large or too small, or excessive rotor ovality.
2345
System: turbocharger shaft speed sensor — abnormal refresh rate.
Conditions for the code to appear: turbocharger shaft speed sensor No. 1 shows an erroneous speed value.
Effect: no effect on operation; the electronic control unit approximately calculates the turbocharger shaft speed.
Possible fault location:
- sensor connection;
- gap between the sensor and rotor too large or too small;
- turbocharger shaft speed sensor.
2346
System: temperature before the turbine — data above the normal operating range, low level of limitation.
Conditions for the code to appear: the temperature before the turbine exceeds the engine protection limit.
Effect: fuel supply limitation to reduce the turbine inlet temperature; engine power has been reduced to lower the temperature before the turbine.
2347
System: compressor outlet temperature — data above the normal operating range, low level of limitation.
Conditions for the code to appear: the electronic control unit has calculated a high compressor outlet temperature.
Effect: fuel supply limitation to reduce the compressor outlet temperature.
Possible fault location:
- air leaks allowing hot air from the engine compartment into the intake;
- incorrect boost pressure data;
- data on high turbocharger shaft speed;
- barometric pressure sensor;
- turbocharger seized.
2351
System: EGR valve electric actuator — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit of the EGR valve.
Effect: power reduction is possible; no power is supplied to the EGR valve electric motor.
Possible fault location: short circuit to ground.
2352
System: EGR valve electric actuator — high level in the circuit.
Conditions for the code to appear: short circuit to power in the EGR valve circuit.
Effect: power reduction is possible; no power is supplied to the EGR valve electric motor.
Possible fault location: open or short to power.
2357
System: EGR valve electric actuator — mechanical system does not respond or is out of adjustment limits.
Conditions for the code to appear: the EGR valve electric actuator is stuck in the open position.
Effect: the EGR valve electric actuator is disabled.
Possible fault location:
- EGR valve position sensor;
- damage (blockage or sticking) of the EGR valve electric actuator requiring increased current for valve operation.
2363
System: engine brake actuator 2 — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit of engine brake actuator 2.
Effect: the engine brake on cylinders No. 4, 5, 6 cannot be activated.
Possible fault location:
- short circuit to ground;
- electronic control unit.
2367
System: engine brake actuator No. 2 — high level in the circuit.
Conditions for the code to appear: short circuit to power in the circuit of engine brake actuator No. 2.
Effect: the engine brake on cylinders No. 4, 5, 6 cannot be activated.
Possible fault location:
- open circuit;
- short circuit to power;
- electronic control unit.
2369
System: exhaust brake actuator — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit of the exhaust brake actuator.
Effect: no effect on operation.
Possible fault location: short circuit to ground.
2371
System: exhaust brake actuator — high level in the circuit.
Conditions for the code to appear: short circuit to power in the exhaust brake actuator circuit.
Effect: no effect on operation.
Possible fault location: short circuit to power.
2373
System: exhaust gas pressure sensor — high level in the circuit.
Conditions for the code to appear: short circuit to power in the exhaust gas pressure sensor circuit.
Effect: no effect on operation.
Possible fault location:
- open ground wire in the harness, connectors or sensor;
- signal wire shorted to power.
2374
System: exhaust gas pressure sensor — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit of the exhaust gas pressure sensor.
Effect: no effect on operation.
Possible fault location:
- open or short to ground of the signal wire in the wiring or sensor;
- open or short to ground of the power circuit.
2377
System: cooling system fan electric motor — high level in the circuit.
Conditions for the code to appear: short circuit to power in the cooling system fan electric motor circuit.
Effect: the fan is constantly on or does not work.
Possible fault location:
- open circuit of the cooling system fan electric motor;
- short circuit to power;
- electronic control unit.
2387
System: turbocharger geometry change actuator — mechanical system does not respond or is out of adjustment limits.
Conditions for the code to appear: the turbine vane actuator controller has detected an incorrect stop threshold, or the actuator does not move to the closed position.
Effect: actuator movement may be limited; large boost air leaks.
2398
System: ambient air temperature sensor — signal differs from the specified one, is intermittent or incorrect.
Conditions for the code to appear: the ambient air temperature sensor produces incorrect readings.
Effect: the electronic control unit approximately calculates the ambient air temperature.
Possible fault location:
- sensor readings stuck in one range;
- high resistance in the sensor circuit;
- electronic control unit.
2442
System: injector 1 — no calibration.
Conditions for the code to appear: an incorrect injector correction code has been entered.
Effect: no effect on operation.
Possible fault location: an incorrect injector correction code has been entered.
2443
System: injector 2 — no calibration.
Conditions for the code to appear: an incorrect injector correction code has been entered.
Effect: no effect on operation.
Possible fault location: an incorrect injector correction code has been entered.
2444
System: injector 3 — no calibration.
Conditions for the code to appear: an incorrect injector correction code has been entered.
Effect: no effect on operation.
Possible fault location: an incorrect injector correction code has been entered.
2445
System: injector 4 — no calibration.
Conditions for the code to appear: an incorrect injector correction code has been entered.
Effect: no effect on operation.
Possible fault location: an incorrect injector correction code has been entered.
2448
System: coolant level sensor — data below the normal operating range, low level of limitation.
Conditions for the code to appear: a low coolant level has been detected.
Effect: no effect on operation.
Possible fault location: low coolant level.
2449
System: turbocharger geometry change actuator — no calibration.
Conditions for the code to appear: when the ignition is turned on, the turbocharger geometry change actuator cannot perform automatic calibration.
Effect: low boost pressure; no open position of the turbine vane actuator.
Possible fault location:
- turbocharger geometry change actuator installed incorrectly;
- foreign particles may obstruct vane movement when the ignition is turned on.
2451
System: exhaust gas temperature at the turbine inlet — data above the normal operating range, medium level of limitation.
Conditions for the code to appear: the temperature before the turbine exceeds the engine protection limit.
Effect: fuel supply limitation to reduce the turbine inlet temperature.
Possible fault location:
- low boost pressure;
- engine power has been reduced to lower the temperature before the turbine;
- leaks in the exhaust gas recirculation (EGR) system.
2555
System: intake air heater 1 — high level in the circuit.
Conditions for the code to appear: short circuit to power in the intake air heater 1 circuit.
Effect: intake air heater 1 is on all the time or off.
Possible fault location:
- signal wire not connected to the intake air heater relay;
- ground wire not connected to the intake air heater relay;
- open circuit in the intake air heater relay signal wire circuit;
- open circuit in the intake air heater relay ground wire circuit;
- signal wire shorted to power.
2556
System: intake air heater 1 — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit of intake air heater 1.
Effect: intake air heater 1 is on all the time or off.
Possible fault location:
- short circuit in the relay;
- relay power wire shorted to ground.
2634
System: turbocharger geometry change actuator — control unit or component malfunction.
Conditions for the code to appear: an internal error of the turbine vane actuator controller has been detected.
Effect: the turbocharger geometry change actuator is disabled.
Possible fault location: internal error of the turbine vane actuator controller.
2635
System: turbocharger geometry change actuator — condition.
Conditions for the code to appear: calibration mismatch between the turbine vane actuator controller and the electronic control unit.
Effect: the turbocharger geometry change actuator is disabled.
Possible fault location: an unsuitable turbocharger geometry change actuator has been installed.
2636
System: turbocharger geometry change actuator — abnormal refresh rate.
Conditions for the code to appear: no J1939 protocol communication between the electronic control unit and the turbine vane actuator controller.
Effect: the actuator will move to the default open position.
Possible fault location:
- no power to the turbocharger geometry change actuator from the electronic control unit;
- open ground wire of the turbocharger geometry change actuator;
- Multiplex bus SAE J1939;
- rapid cyclic ignition on/off;
- electronic control unit.
2771
System: sensor at the aftertreatment system outlet — abnormal refresh rate.
Conditions for the code to appear: no communication or incorrect data via the J1939 protocol between the electronic control unit and the NOx sensor at the aftertreatment system outlet.
Effect: the NOx sensor at the aftertreatment system outlet is disabled.
Possible fault location:
- no power to the sensor from the electronic control unit;
- open ground wire;
- open or short in the Multiplex bus SAE J1939;
- electronic control unit.
2772
System: NOx sensor at the aftertreatment system outlet — data above the normal operating range, low level of limitation.
Conditions for the code to appear: the NOx content in the exhaust gas is above the recommended level.
Effect: no effect on operation.
Possible fault location:
- aftertreatment fluid quantity below normal;
- aftertreatment fluid leaks in the doser or lines;
- doser nozzle damage;
- high sulfur content in the fuel;
- doser nozzle partially or completely clogged;
- aftertreatment catalyst damaged or missing.
2773
System: sensor at the aftertreatment system outlet — data above the normal operating range, high level of limitation.
Conditions for the code to appear: the NOx content in the exhaust gas is above the recommended level.
Effect: the NOx sensor at the aftertreatment system outlet is disabled; engine performance will be reduced, and the next time the vehicle speed will be reduced to 0.
Possible fault location:
- aftertreatment fluid quantity below normal;
- aftertreatment fluid leaks in the doser or lines;
- doser nozzle damage;
- high sulfur content in the fuel;
- doser nozzle partially or completely clogged;
- aftertreatment catalyst damaged or missing.
2963
System: coolant temperature sensor — coolant temperature protection, low level of limitation.
Conditions for the code to appear: the coolant temperature is above normal.
Effect: power reduction; engine shutdown is possible if protective shutdown is permitted.
Possible fault location: high coolant temperature.
2964
System: boost pressure sensor and intake air temperature sensor assembly — data above the normal operating range, high level of limitation.
Conditions for the code to appear: the intake manifold air temperature sensor signal indicates that the air temperature exceeds the critical engine protection limit.
Effect: successive power reduction depending on the warning signal on-time.
Possible fault location:
- charge air cooler fins clogged;
- increased resistance in the charge air cooler;
- charge air cooler too small;
- high compressor outlet temperature.
2973
System: boost pressure sensor and intake air temperature sensor assembly — signal differs from the specified one, is intermittent or incorrect.
Conditions for the code to appear: the boost pressure sensor data in the intake manifold are unreliable when the ignition is turned on or during engine operation.
Effect: the indicator (MIL) lights up, and engine performance may decrease.
Possible fault location:
- boost pressure sensor and intake air temperature sensor assembly;
- barometric pressure sensor;
- leaks between the compressor and the intake manifold;
- increased resistance in the charge air cooler;
- turbocharger shaft speed sensor;
- intake air temperature sensor before the compressor;
- wiring damage.
2976
System: aftertreatment fluid doser temperature sensor — signal differs from the specified one, is intermittent or incorrect.
Conditions for the code to appear: an internal error of the aftertreatment fluid doser has been detected.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location: the readings of the aftertreatment fluid doser temperature sensor do not correspond to other temperature sensors.
3142
System: exhaust gas aftertreatment system inlet temperature sensor — high level in the circuit.
Conditions for the code to appear: short circuit to power in the exhaust gas aftertreatment system inlet temperature sensor circuit.
Effect: the default value is used for the exhaust gas aftertreatment system inlet temperature sensor.
Possible fault location:
- open ground circuit;
- open or short to power of the signal wire.
3143
System: exhaust gas aftertreatment system inlet temperature sensor — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit of the exhaust gas aftertreatment system inlet temperature sensor.
Effect: the default value is used for the exhaust gas aftertreatment system inlet temperature sensor.
Possible fault location:
- short circuit of the signal wire to ground;
- sensor shorted to the ground wire or ground.
3144
System: exhaust gas aftertreatment system inlet temperature sensor — signal differs from the specified one, is intermittent or incorrect.
Conditions for the code to appear: the readings of the exhaust gas aftertreatment system inlet temperature sensor do not change during engine operation.
Effect: the default value is used for the exhaust gas aftertreatment system inlet temperature sensor.
Possible fault location:
- sensor readings stuck in one range;
- high resistance in the sensor circuit.
3145
System: exhaust gas aftertreatment catalyst inlet temperature sensor — abnormal refresh rate.
Conditions for the code to appear: the readings of the exhaust gas aftertreatment catalyst inlet temperature sensor do not change during engine operation.
Effect: the default value is used for the exhaust gas aftertreatment catalyst inlet temperature sensor.
Possible fault location:
- sensor readings stuck in one range;
- high resistance in the sensor circuit.
3146
System: exhaust gas aftertreatment system outlet temperature sensor — high level in the circuit.
Conditions for the code to appear: short circuit to power in the exhaust gas aftertreatment system outlet temperature sensor circuit.
Effect: the default value is used for the exhaust gas aftertreatment system outlet temperature sensor.
Possible fault location:
- open ground wire in the harness, connectors or sensor;
- open or short to power of the signal wire.
3147
System: exhaust gas aftertreatment system outlet temperature sensor — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit of the exhaust gas aftertreatment system outlet temperature sensor.
Effect: the default value is used for the exhaust gas aftertreatment system outlet temperature sensor.
Possible fault location:
- short circuit of the signal wire to ground;
- short circuit to the ground wire or ground of the signal wire.
3149
System: exhaust gas aftertreatment system outlet temperature sensor — abnormal refresh rate.
Conditions for the code to appear: the readings of the exhaust gas aftertreatment system outlet temperature sensor do not change during engine operation.
Effect: the default value is used for the exhaust gas aftertreatment system outlet temperature sensor.
Possible fault location:
- sensor readings stuck in one range;
- high resistance in the sensor circuit.
3151
System: exhaust gas aftertreatment catalyst — not detected.
Conditions for the code to appear: the exhaust gas aftertreatment catalyst in the exhaust system has not been detected.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location:
- incorrect calibrations;
- aftertreatment catalyst damaged or missing.
3163
System: exhaust gas aftertreatment system inlet temperature sensor — replacement, no calibration.
Conditions for the code to appear: the exhaust gas aftertreatment system inlet and outlet temperature sensors have been replaced.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location: the inlet and outlet sensor connectors were mixed up during installation.
3164
System: exhaust gas aftertreatment system inlet temperature sensor — data above the normal operating range, low level of limitation.
Conditions for the code to appear: a high exhaust gas aftertreatment system inlet temperature has been detected.
Effect: engine performance may be reduced.
Possible fault location: high exhaust gas aftertreatment system inlet temperature.
3236
System: exhaust gas aftertreatment system outlet temperature sensor — data above the normal operating range, medium level of limitation.
Conditions for the code to appear: a high exhaust gas aftertreatment system outlet temperature has been detected.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location: high exhaust gas aftertreatment system outlet temperature.
3237
System: exhaust gas aftertreatment fluid line heater 1 — high level in the circuit.
Conditions for the code to appear: short circuit to power in the exhaust gas aftertreatment fluid line heater 1 circuit.
Effect: exhaust gas aftertreatment fluid line heater 1 is disabled.
Possible fault location:
- heater;
- short circuit to power;
- electronic control unit.
3238
System: exhaust gas aftertreatment fluid line heater 1 — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit of exhaust gas aftertreatment fluid line heater 1.
Effect: exhaust gas aftertreatment fluid line heater 1 is disabled.
Possible fault location:
- heater;
- heater relay;
- short circuit to ground;
- electronic control unit.
3239
System: exhaust gas aftertreatment fluid line heater 2 — high level in the circuit.
Conditions for the code to appear: short circuit to power in the exhaust gas aftertreatment fluid line heater 2 circuit.
Effect: exhaust gas aftertreatment fluid line heater 2 is disabled.
Possible fault location:
- heater;
- short circuit to power in the doser control unit wiring;
- doser control unit.
3242
System: aftertreatment fluid heater — mechanical system does not respond or is out of adjustment limits.
Conditions for the code to appear: the aftertreatment fluid temperature does not rise when the aftertreatment fluid tank heater enable signal is present.
Effect: no effect on operation; if frozen, the aftertreatment fluid may not be supplied to the aftertreatment system.
Possible fault location:
- tank heater control valve remains stuck in the closed position;
- blockage or narrowing of the coolant channel in the tank heater;
- low coolant level;
- tank heater control valve;
- no signal to enable tank heating from the doser control unit.
3258
System: exhaust gas aftertreatment fluid line heater 1 — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit of exhaust gas aftertreatment fluid line heater 1.
Effect: exhaust gas aftertreatment fluid line heater 1 is disabled.
Possible fault location:
- heater;
- heater relay;
- open circuit or short to ground, or blown fuse in the doser control unit circuit;
- doser control unit.
3261
System: exhaust gas aftertreatment fluid line heater 2 — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit of exhaust gas aftertreatment fluid line heater 2.
Effect: exhaust gas aftertreatment fluid line heater 2 is disabled.
Possible fault location:
- heater;
- heater relay;
- open circuit or short to ground, or blown fuse in the doser control unit circuit;
- doser control unit.
3326
System: accelerator pedal position sensor SAE J1939 — abnormal refresh rate.
Conditions for the code to appear: the electronic control unit expects a signal from the accelerator pedal position sensor but receives it too slowly or not at all.
Effect: the engine runs at idle only.
Possible fault location: Multiplex bus SAE J1939.
3382
System: exhaust gas recirculation system — data below the normal operating range, medium level of limitation.
Conditions for the code to appear: the measured exhaust gas recirculation is less than the specified value.
Effect: engine performance may be reduced.
Possible fault location:
- leaks or obstruction of the EGR system exhaust gas flow;
- internal EGR valve leaks;
- EGR valve stuck in the closed position;
- EGR system differential pressure sensor.
3383
System: exhaust gas recirculation system — data above the normal operating range, medium level of limitation.
Conditions for the code to appear: the measured exhaust gas recirculation is greater than the specified value.
Effect: engine performance may be reduced.
Possible fault location:
- throttle actuator;
- EGR valve leaks;
- mass air flow sensor.
3422
System: exhaust gas aftertreatment fluid line heater 3 — high level in the circuit.
Conditions for the code to appear: short circuit to power in the exhaust gas aftertreatment fluid line heater 3 circuit.
Effect: exhaust gas aftertreatment fluid line heater 3 is disabled.
Possible fault location:
- heater;
- short circuit to power in the doser control unit wiring;
- doser control unit.
3425
System: exhaust gas aftertreatment fluid line heater 3 — low level in the circuit.
Conditions for the code to appear: short circuit to ground or open circuit of exhaust gas aftertreatment fluid line heater 3.
Effect: exhaust gas aftertreatment fluid line heater 3 is disabled.
Possible fault location:
- heater;
- heater relay;
- short circuit to ground;
- doser control unit.
3426
System: exhaust gas aftertreatment fluid line heater 4 — high level in the circuit.
Conditions for the code to appear: short circuit to power in the exhaust gas aftertreatment fluid line heater 4 circuit.
Effect: exhaust gas aftertreatment fluid line heater 4 is disabled.
Possible fault location:
- heater;
- short circuit to power in the doser control unit circuit;
- doser control unit.
3429
System: exhaust gas aftertreatment fluid line heater 4 — low level in the circuit.
Conditions for the code to appear: short circuit to ground or open circuit of exhaust gas aftertreatment fluid line heater 4.
Effect: exhaust gas aftertreatment fluid line heater 4 is disabled.
Possible fault location:
- heater;
- open or short to ground of the doser control unit circuit;
- doser control unit.
3539
System: throttle actuator electric motor — high level in the circuit.
Conditions for the code to appear: short circuit to power in the throttle position sensor circuit.
Effect: power reduction is possible; no power will be supplied to the throttle actuator electric motor.
Possible fault location:
- open ground circuit;
- signal wire grounded to power;
- throttle position sensor;
- electronic control unit.
3541
System: throttle actuator electric motor — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit of the throttle position sensor.
Effect: power reduction is possible; no power will be supplied to the throttle actuator electric motor.
Possible fault location:
- open or short to ground of the signal wire;
- open or short to ground of the power wire;
- sensor shorted to ground.
3542
System: throttle actuator electric motor — signal differs from the specified one, is intermittent or incorrect.
Conditions for the code to appear: incorrect data is coming from the throttle position sensor, or the throttle actuator position does not change during engine operation.
Effect: engine performance may be reduced.
Possible fault location:
- intermittent open or short in the wiring;
- throttle position sensor;
- throttle actuator electric motor stuck or damaged;
- electronic control unit.
3548
System: aftertreatment fluid doser — no primary injection.
Conditions for the code to appear: the doser cannot perform primary injection.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location:
- low aftertreatment fluid level in the tank;
- low air pressure in the doser;
- air filter lines clogged or narrowed;
- aftertreatment fluid doser lines blocked, narrowed, frozen or leaking;
- doser air ingress through a loose or damaged connector or line.
3557
System: aftertreatment fluid doser control unit — signal differs from the specified one, is intermittent or incorrect.
Conditions for the code to appear: the aftertreatment fluid doser control unit has detected a signal level that is too high or too low.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location: aftertreatment fluid doser control unit.
3558
System: aftertreatment fluid doser — high level in the circuit.
Conditions for the code to appear: short circuit to power in the aftertreatment fluid doser control unit circuit.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location:
- short circuit to power of the aftertreatment fluid doser;
- short circuit to power of the doser control unit circuit;
- doser control unit.
3559
System: aftertreatment fluid doser — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit of the aftertreatment fluid doser control unit.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location:
- short circuit to ground of the aftertreatment fluid doser;
- short circuit to ground of the doser control unit circuit;
- doser control unit.
3561
System: aftertreatment fluid doser — low level in the circuit.
Conditions for the code to appear: open circuit in the doser circuit.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location:
- open circuit in the doser circuit;
- open circuit in the doser control unit circuit;
- doser control unit.
3562
System: exhaust gas aftertreatment fluid line heater relay — high level in the circuit.
Conditions for the code to appear: short circuit to power in the exhaust gas aftertreatment fluid line heater relay circuit.
Effect: exhaust gas aftertreatment fluid line heaters 1, 2, 3 are disabled.
Possible fault location:
- short circuit to power of the heater relay circuit;
- short circuit to power of the doser control unit circuit;
- doser control unit.
3563
System: exhaust gas aftertreatment fluid line heater relay — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit of the exhaust gas aftertreatment fluid line heater relay.
Effect: exhaust gas aftertreatment fluid line heaters 1, 2, 3 are disabled.
Possible fault location:
- short circuit to ground of the heater relay circuit;
- short circuit to ground of the doser control unit circuit;
- doser control unit.
3564
System: exhaust gas aftertreatment fluid line heater relay — low current.
Conditions for the code to appear: open circuit or low current in the exhaust gas aftertreatment fluid line heater relay circuit.
Effect: exhaust gas aftertreatment fluid line heaters 1, 2, 3 are disabled.
Possible fault location:
- open circuit in the heater relay circuit;
- open circuit in the doser control unit circuit;
- doser control unit.
3565
System: exhaust gas aftertreatment fluid doser valve — high level in the circuit.
Conditions for the code to appear: short circuit to power in the exhaust gas aftertreatment fluid doser valve circuit.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location:
- short circuit to power of the doser valve circuit;
- short circuit to power of the doser control unit circuit;
- doser control unit.
3566
System: exhaust gas aftertreatment fluid doser valve — low level in the circuit.
Conditions for the code to appear: short circuit to ground of the exhaust gas aftertreatment fluid doser valve circuit.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location:
- short circuit to ground of the doser valve circuit;
- short circuit to ground of the doser control unit circuit;
- doser control unit.
3567
System: exhaust gas aftertreatment fluid doser valve — low current.
Conditions for the code to appear: open circuit or low current in the exhaust gas aftertreatment fluid doser valve circuit.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location:
- open circuit in the doser valve circuit;
- open circuit in the doser control unit circuit;
- doser control unit.
3568
System: exhaust gas aftertreatment fluid doser valve — mechanical system does not respond or cannot be adjusted.
Conditions for the code to appear: a mechanical malfunction of the exhaust gas aftertreatment fluid doser valve has been detected.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location: exhaust gas aftertreatment fluid doser valve.
3569
System: exhaust gas aftertreatment fluid doser lines.
Conditions for the code to appear: a disruption of the exhaust gas aftertreatment fluid supply has been detected.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location:
- doser nozzle blocked or partially clogged;
- doser nozzle lines blocked or narrowed;
- doser control unit.
3571
System: exhaust gas aftertreatment fluid pressure sensor — high level in the circuit.
Conditions for the code to appear: short circuit to power in the exhaust gas aftertreatment fluid pressure sensor circuit.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location:
- signal wire shorted to power;
- doser control unit wiring;
- doser control unit.
3572
System: exhaust gas aftertreatment fluid pressure sensor — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit of the exhaust gas aftertreatment fluid pressure sensor.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location:
- signal wire shorted to ground;
- doser control unit wiring;
- doser control unit.
3574
System: exhaust gas aftertreatment fluid pressure sensor — data below the normal operating range, medium level of limitation.
Conditions for the code to appear: the doser has detected low exhaust gas aftertreatment fluid pressure.
Effect: aftertreatment fluid may not be supplied to the aftertreatment system.
Possible fault location:
- low aftertreatment fluid level in the tank;
- aftertreatment doser lines blocked, narrowed or frozen;
- aftertreatment fluid tank filter blocked or clogged;
- aftertreatment fluid doser filter blocked or clogged;
- aftertreatment fluid line connectors blocked or clogged;
- aftertreatment fluid contaminated;
- aftertreatment fluid doser.
3575
System: exhaust gas aftertreatment fluid pressure sensor — data above the normal operating range, medium level of limitation.
Conditions for the code to appear: the doser has detected blockage of the exhaust gas aftertreatment fluid return line.
Effect: aftertreatment fluid may not be supplied to the aftertreatment system.
Possible fault location:
- aftertreatment fluid return line blocked or narrowed;
- aftertreatment fluid doser.
3576
System: exhaust gas aftertreatment fluid tank heater — low level in the circuit.
Conditions for the code to appear: open circuit of the exhaust gas aftertreatment fluid tank heater control valve.
Effect: the exhaust gas aftertreatment fluid tank heater is disabled.
Possible fault location:
- open circuit of the doser control unit;
- tank heater control valve;
- doser control unit.
3577
System: exhaust gas aftertreatment fluid return valve — high level in the circuit.
Conditions for the code to appear: short circuit to power in the exhaust gas aftertreatment fluid return valve circuit.
Effect: the exhaust gas aftertreatment fluid return valve is disabled; the exhaust gas aftertreatment system is not cleaned.
Possible fault location:
- exhaust gas aftertreatment fluid return valve;
- wiring and connectors.
3578
System: exhaust gas aftertreatment fluid return valve — low level in the circuit.
Conditions for the code to appear: short circuit to the low-voltage circuit of the exhaust gas aftertreatment fluid return valve.
Effect: the exhaust gas aftertreatment fluid return valve is disabled; the exhaust gas aftertreatment system is not cleaned.
Possible fault location:
- exhaust gas aftertreatment fluid return valve;
- wiring and connectors.
3579
System: exhaust gas aftertreatment fluid return valve — low current.
Conditions for the code to appear: open circuit of the exhaust gas aftertreatment fluid return valve.
Effect: the exhaust gas aftertreatment fluid return valve is disabled; the exhaust gas aftertreatment system is not cleaned.
Possible fault location:
- exhaust gas aftertreatment fluid return valve;
- wiring and connectors.
3596
System: exhaust gas aftertreatment fluid pressure sensor — signal differs from the specified one, is intermittent or incorrect.
Conditions for the code to appear: the exhaust gas aftertreatment fluid pressure sensor produces values that are too high or too low.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location:
- leaks in the exhaust gas aftertreatment fluid lines;
- aftertreatment fluid doser.
3597
System: aftertreatment fluid doser control unit — abnormal refresh rate.
Conditions for the code to appear: communication between the electronic control unit and the aftertreatment fluid doser control unit has been interrupted.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location:
- no power to the aftertreatment fluid doser control unit;
- no ground at the aftertreatment fluid doser control unit;
- Multiplex bus SAE J1939;
- doser control unit.
3598
System: aftertreatment fluid doser control unit — received data error.
Conditions for the code to appear: the data received by the electronic control unit from the aftertreatment fluid doser control unit are unreadable or missing.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location:
- electronic control unit;
- engine calibrations corrupted;
- doser control unit;
- doser control unit calibrations corrupted;
- presence of active engine or aftertreatment sensor codes that send data required for aftertreatment fluid dosing control.
3612
System: aftertreatment fluid doser — mechanical system does not respond or cannot be adjusted.
Conditions for the code to appear: incomplete power shutdown has been detected in the aftertreatment system.
Effect: no effect on operation.
Possible fault location: after the engine stop, the cleaning cycle of the aftertreatment fluid supply elements was not completed.
3616
System: turbine vane actuator position sensor — mechanical system does not respond or cannot be adjusted.
Conditions for the code to appear: the vane position actuator control unit has detected incorrect stop limits, or the actuator cannot move to the closed position.
Effect: vane position change may be limited.
Possible fault location:
- the turbocharger vanes have not reached the required position;
- large boost air leaks.
3648
System: aftertreatment fluid doser control unit temperature sensor — data above the normal operating range, medium level of limitation.
Conditions for the code to appear: the temperature inside the aftertreatment fluid doser control unit is above the permissible limits.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location:
- incorrect cooling air flow direction of the doser control unit;
- incorrect installation of the doser control unit;
- doser control unit.
3651
System: aftertreatment fluid tank temperature sensor — data below the normal operating range, medium level of limitation.
Conditions for the code to appear: the temperature in the aftertreatment fluid tank does not reach the required value.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location:
- blockage or narrowing of the coolant channel in the tank heater;
- coolant hose of the aftertreatment fluid tank heater disconnected or damaged;
- tank heater control valve remains stuck in the closed position;
- aftertreatment fluid tank temperature sensor;
- operation at very low ambient temperature.
3679
System: aftertreatment fluid doser — root cause unknown.
Conditions for the code to appear: initialization error of the aftertreatment fluid doser control unit.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location:
- open or short circuit;
- aftertreatment fluid doser.
3681
System: NOx sensor at the aftertreatment system outlet power supply — signal differs from the specified one, is intermittent or incorrect.
Conditions for the code to appear: the sensor supply value does not correspond to the nominal value.
Effect: no effect on operation.
Possible fault location:
- short circuit to power or ground;
- sensor.
3697
System: electronic control unit — memory calibration.
Conditions for the code to appear: internal error of the electronic control unit related to a software failure.
Effect: the engine may not start.
Possible fault location: electronic control unit.
3713
System: exhaust gas aftertreatment fluid line heater relay — mechanical system does not respond or cannot be adjusted.
Conditions for the code to appear: short circuit to power in the exhaust gas aftertreatment fluid line heater circuit.
Effect: exhaust gas aftertreatment fluid line heaters 1, 2, 3 are disabled.
Possible fault location:
- heater relay permanently closed;
- short circuit to power of the wiring between the relay and the heater.
3726
System: NOx sensor at the aftertreatment system inlet — data above the normal operating range, medium level of limitation.
Conditions for the code to appear: the aftertreatment fluid doser cannot fulfil the fluid supply request for adequate NOx reduction.
Effect: no effect on operation.
Possible fault location: aftertreatment fluid doser.
3735
System: SAE J1939 data channel — abnormal refresh period.
Conditions for the code to appear: communication between the electronic control unit and other devices via the SAE J1939 data channel has been lost.
Effect: engine speed will gradually decrease and remain at idle.
Possible fault location:
- SAE J1939 data bus;
- external control unit of the vehicle auxiliary equipment;
- electronic control unit.
3736
System: aftertreatment fluid doser control unit — root cause unknown.
Conditions for the code to appear: data exchange between the electronic control unit and the aftertreatment fluid doser control unit that is not provided for by the program.
Effect: aftertreatment fluid is not supplied to the aftertreatment system.
Possible fault location:
- SAE J1939 data bus;
- electronic control unit;
- engine calibrations corrupted;
- doser control unit;
- doser control unit calibrations corrupted.
3749
System: sensor at the aftertreatment system outlet — data irrational, large difference.
Conditions for the code to appear: the data of the NOx sensor at the aftertreatment system outlet do not change during engine operation.
Effect: no effect on operation.
Possible fault location:
- NOx sensor removed;
- NOx sensor.
3866
System: aftertreatment fluid level sensor — data above the normal operating range, high level of limitation.
Conditions for the code to appear: the aftertreatment fluid level is below the maximum permissible value.
Effect: engine torque will be automatically reduced after 36 hours.
Possible fault location:
- unsuitable aftertreatment fluid;
- aftertreatment fluid level sensor;
- diesel fuel in the aftertreatment fluid tank.
3867
System: aftertreatment fluid level sensor — data above the normal operating range, medium level of limitation.
Conditions for the code to appear: the aftertreatment fluid level is below the maximum permissible value.
Effect: engine torque will be automatically reduced after 36 hours.
Possible fault location:
- unsuitable aftertreatment fluid;
- aftertreatment fluid level sensor.
3868
System: aftertreatment fluid level sensor — abnormal refresh rate.
Conditions for the code to appear: no communication between the electronic control unit and the aftertreatment fluid level sensor via the J1939 bus.
Effect: engine torque will be automatically reduced.
Possible fault location:
- no power to the aftertreatment fluid level sensor;
- open ground wire of the aftertreatment fluid level sensor;
- open or short circuit in the SAE J1939 bus circuit between the sensor and the electronic control unit;
- periodic loss of communication via the SAE J1939 bus between the sensor and the electronic control unit.
3876
System: aftertreatment fluid level sensor — mechanical system does not respond or cannot be adjusted.
Conditions for the code to appear: the aftertreatment fluid level sensor does not detect fluid.
Effect: engine torque will be automatically reduced after 36 hours.
Possible fault location:
- aftertreatment fluid level sensor installed incorrectly;
- low aftertreatment fluid level;
- aftertreatment fluid level sensor;
- the aftertreatment fluid contains other fluids (diesel fuel, coolant, oil, etc.);
- tank filled with water;
- fluid temperature outside the measuring range of the aftertreatment fluid level sensor.
