Continuation of the Cummins ISF3.8 DTC table

Displaying fault codes

To display fault codes, turn off the engine, turn the ignition switch to the “I” position and turn on the diagnostic mode with the diagnostic test switch.

If there are no active faults, the stop and warning lamps remain on but do not flash.

But if active fault codes are present, then the ECU starts to display fault codes.

Before the fault code is displayed, the warning lamp turns on, after it is turned off, the computer displays (blinks) the number of the active fault code with the stop lamp (short pauses indicate the end of the character).

When the warning lamp turns on again, the stop lamp starts displaying (flashing) the next number of active fault codes (the function of separating the next fault code from the previous one).

The ECU continues to flash the DTC until the user uses the diagnostic switch to toggle the DTC to the next or previous one.

The control system uses three- and four-digit trouble codes.

Diagnostic mode remains active until the diagnostic switch is turned off or the engine is turned on.

In the previous article, tables of fault codes were discussed (see the beginning of the article - Cummins ISF3.8 Engine Diagnostics)

This article continues with code tables:

code

System

Result

Conditions for the appearance of the code

Possible fault location

686

Turbocharger shaft speed sensor

signal is different from the specified, intermittent or incorrect

The electronic control unit has detected an incorrect turbocharger speed sensor signal

Does not affect performance.

The electronic control unit approximately calculates the speed of the turbocharger.

• - turbocharger shaft speed sensor.
• - Engine wiring.
• - Power or ground of the electronic control unit.
• - Electrical appliances with strong electromagnetic radiation.

687

Turbocharger shaft speed sensor

• - data below normal operating range, medium limit

The electronic control unit has detected a low turbocharger shaft speed

Power reduction. The electronic control unit approximately calculates the speed of the turbocharger.

• - turbocharger shaft speed sensor.
• - Engine wiring.
• - Electronic control unit.

688

engine oil level sensor - data above normal operating range, high limit

The engine oil level sensor has detected a high engine oil level

Possible power loss, excessive smoke, oil deterioration, contamination or severe engine damage. Engine performance may be reduced.

• - Oil overflow after oil change.
• - Fuel leaks in engine oil.
• - Coolant leaks into engine oil.

689

Crankshaft position sensor - signal is different from the specified, intermittent or incorrect

Lost signal from crankshaft position sensor

The engine may not run smoothly. Difficult starting possible. The motor is running using the auxiliary encoder. Power reduction.

• - Breakage or short circuit of the 5 V power wire, signal wire or ground wire in the motor wiring.
• - Damage or malfunction of the engine speed sensor.

691

air temperature sensor in front of the compressor - high level in the circuit

Short to power supply of the air temperature sensor before the compressor

Power reduction

• - Break in the ground wire in the harness, connectors or sensor.
• - Open or short to power signal wire.
• - Sensor damage.

692

air temperature sensor in front of the compressor - low level in the circuit

Short circuit to the low voltage circuit of the air temperature sensor before the compressor

Power reduction

• - Signal wire short to ground.
• - Short circuit to ground wire or ground signal wire in the sensor.
• - Sensor damage.

693

air temperature sensor in front of the compressor - the signal is different from the set, intermittent or incorrect

The signal of the air temperature sensor before the compressor is too low or too high for this operating condition

for operation, the standard values \u200b\u200bof the air temperature sensor in front of the computer are used spring

• - Sensor readings are fixed in one range.
• - High resistance in the sensor circuit.

697

temperature sensor of the electronic control unit -

high level in the circuit

Short to power or open circuit of the temperature sensor of the electronic control unit

Does not affect performance

Electronic control unit

698

ECU temperature sensor - circuit low

Short to low voltage or open circuit of the temperature sensor of the electronic control unit

Does not affect performance

Electronic control unit

699

temperature sensor of the electronic control unit - the signal is different from the set, intermittent or incorrect

Incorrect or unstable data from the temperature sensor of the electronic control unit

Does not affect performance

Electronic control unit

731

crankshaft and camshaft position sensors - misalignment, mechanical system not responding or cannot be adjusted

The crankshaft and camshaft position sensors signals are mismatched

Engine performance will be reduced. Possible difficult start and uneven idling.

• - Sensor rotor.
• - Installing a sensor or rotor.

778

crankshaft and camshaft position sensors - signal is different from the specified, intermittent or incorrect

The electronic control unit has detected a loss of signal from the camshaft position sensor

The engine may not run smoothly. Difficult starting possible. the motor is running using the main encoder.

• - Breakage or short circuit of the 5 V power wire, signal wire or ground wire in the motor wiring.
• - Damage or malfunction of the camshaft position sensor.

1117

Deviations with the ignition key in the ON position - the signal is different from the specified, intermittent or incorrect

ECU supply voltage momentarily drops below 6.2 volts DC or the ECU does not reduce voltage correctly (battery voltage remains after turning the ignition key OFF for 30 seconds)

Slight fluctuations in operation may occur or the engine will stall or be difficult to start.

The following information may not display correctly: fault codes, trip data, and maintenance data.

Power supply of the electronic control unit

1228

EGR valve actuator - signal is different from the specified, intermittent or incorrect

The EGR valve position sensor is receiving invalid data or the sensor reading does not change when the engine is running

Engine performance will be reduced. The ECM will attempt to close the EGR valve motor.

• - Periodic short circuit or open circuit.
• - EGR valve position sensor.
• - Electronic control unit.
• - EGR valve. blocked or broken.

1239

Accelerator pedal position sensor (channel No. 2) - high level in the circuit

A short circuit to the power supply of the accelerator pedal position sensor circuit (channel No. 2)

Severe reduction in engine power. Get home mode.

• - Short to power (12 V or 5 V) signal wire of the accelerator pedal position sensor.
• - Earth wire break.
• - Shorting the power wire to power.
• - accelerator pedal position sensor.

1241

Accelerator pedal position sensor (channel No. 2) - low level in the circuit

Short circuit to the low voltage circuit of the accelerator pedal position sensor circuit (channel # 2)

Severe reduction in engine power. “Get home” mode.

• - Closing the signal wire to ground or ground wire.
• - accelerator pedal position sensor.
• - Broken wire or connector.

1242

Accelerator pedal position sensors (No. 1 and No. 2) - the signal is different from the specified, intermittent or incorrect

Accelerator pedal position sensors 1 and 2 output inconsistent signals

engine only idling

• - accelerator pedal position sensor (No. 1 and No. 2).
• - Closing the signal wires (channels #1 and #2).

1668

Emission Control Fluid Level Sensor - Circuit Low

Short circuit to the low voltage circuit of the liquid level sensor of the toxicity reduction system

Emission system fluid is not being supplied to the emission system

• - Breakage or short to ground of the signal wire in the wiring or sensor.
• - Open or short to ground of the power circuit.

1669

level sensor Emission control fluids - high level in circuit

Short circuit to power supply of the liquid level sensor of the toxicity reduction system

Emission system fluid is not being supplied to the emission system

• - Break in the ground wire in the harness, connectors or sensor.
• - The signal wire is shorted to power.

1671

Emission Control System Fluid Level Sensor - Data Below Normal Operating Range, Medium Restriction

Low emission control fluid level detected in reservoir

Does not affect performance

Low Emission Control Fluid in Reservoir

1673

Emission Control System Fluid Level Sensor - Data Below Normal Operating Range, High Limit

Low emission control fluid level detected in reservoir

Emission control fluid is not being supplied to the emission control system. Reduced instantaneous engine power.

No emission control fluid in reservoir

1677

Emission Control Fluid Temperature Sensor Circuit Low

Short circuit to the low voltage circuit of the emission control system fluid temperature sensor

Using setpoint temperature in the emission control fluid reservoir

• - Signal wire short to ground.
• - Short to earth wire or signal wire ground.

1678

Emission Control Fluid Temperature Sensor Circuit High

Emission control fluid temperature sensor short to power

Using setpoint temperature in the emission control fluid reservoir

• - Break in the ground wire in the harness, connectors or sensor.
• - Open or short to power signal wire.

1679

Emission control system fluid temperature sensor - signal is different from the specified, intermittent or incorrect

Emission control system fluid temperature sensor indicates too high or too low temperature, not consistent with outside air temperature

Emission Control Fluid Setpoint Used

• - Sensor readings are fixed in one range.
• - Wiring damage.
• - Control unit for the liquid dispenser of the toxicity reduction system.

1681

Emission Control Fluid Dispenser - Control Unit or Component Fault

An internal error has been detected in the emission control fluid dispenser control unit

Emission system fluid is not being supplied to the emission system

Emission Control Fluid Dispenser Control Unit

1682

Emission Control Fluid Control Unit Inlet Lines - Condition

Emission control system fluid dispenser cannot properly dispense fluid (urea) through nozzle

Emission system fluid is not being supplied to the emission system

• - It is not possible to initialize the emission control system fluid dispenser control unit when the ignition is turned on.
• - Urea crystals in the dispenser interfere with the passage of air into the nozzle and the formation of build-ups in the nozzle itself.
• - Faulty fluid pressure sensor.
• - Poppet valve failure.
• - Contamination of the check valve of the dispenser.
• - Air leak through connections or damaged lines.
• - The channel of the inlet fitting of the dispenser is blocked or narrowed.

1683

Emission Control Fluid Heater Circuit High

Emission control fluid heater circuit shorted to power

No emission control fluid heating

• - The signal wire is not connected to the emission control fluid heater relay.
• - The ground wire is not connected to the emission control fluid heater relay.
• - Emission control fluid heater relay.
• - An open in the emission control fluid heater relay circuit.
• - Shorting the signal wire of the heater to power.

1684

Emission Control Fluid Heater - Circuit Low

Emission control system fluid heater circuit short to low voltage

No emission control fluid heating

• - Closing the relay of the liquid heater of the toxicity reduction system.
• - Shorting the heater signal wire to ground.

1688

Emission Control Fluid Dispenser Control Module - Control Module or Component Malfunction

Update An internal error has been detected in the emission control fluid control unit

Emission system fluid is not being supplied to the emission system

Emission Control Fluid Dispenser Control Unit

1689

Real time clock power interruption - the signal is different from the specified, intermittent or incorrect

No real time clock power

Does not affect performance. The data in the electronic control unit does not contain the exact time and date.

• - Backup battery.
• - Wiring and connectors.

1694

NOx sensor at the outlet of the emission control system - the signal is different from the specified, intermittent or incorrect

Invalid data received from the sensor downstream of the emission control system

The NOx sensor downstream of the emission control system is turned off. Engine torque is reduced.

• - The electronic control unit has determined that the NOx reading is higher or lower than possible.
• - Leaks in the release system.
• - NOx sensor installation
• - Carbon deposits on the sensing element of the sensor
• - Increased engine oil consumption.
• - Misfires.
• - Wrong sensor

1695

Sensor supply circuit 5 - high level in the circuit

Short circuit No. 5 of sensor power supply

Severe reduction in engine power. Get home mode.

Short to power

1696

Sensor supply circuit 5 - circuit low

Short circuit to the low voltage circuit of the sensor supply circuit No. 5

Severe reduction in engine power. Get home mode.

Short to ground

1711

Emission Control Fluid Dispenser - Abnormal Refresh Rate

Communication between the ECM and the emission control fluid dispenser has been interrupted

Emission system fluid is not being supplied to the emission system

• - No power to the liquid dispenser of the toxicity control system.
• - There is no grounding of the liquid dispenser of the toxicity control system.
• - Open or short circuit in the data channel SAE J19З9.
• - fluid dispenser of the toxicity reduction system.

1712

Emission Control Fluid Heater - Data Below Normal Operating Range, Medium Limit

The heater cannot melt the emission control fluid

Does not affect performance.

The emission control system fluid supply to the emission control system may be turned off if it is frozen.

• - Tank heater control valve remains locked in closed position.
• - Blocking or narrowing of the coolant channel in the reservoir heater.
• - Low coolant level.
• - Tank heater control valve.
• - There is no signal to turn on the tank heating from the dispenser control unit.

1713

Emission Control Fluid Heater - Above Normal Operating Range, Medium Limit

Emission Control Fluid Heater Always On

Does not affect performance

• - Tank heater control valve remains locked in open position.
• - Leaks through the tank heater control valve seat.
• - A constant signal is sent from the dispenser control unit to turn on the heating of the tank.

1843

crankcase pressure sensor - circuit high

Short circuit to power crankcase pressure sensor

Does not affect performance

• - Break in the ground wire in the harness, connectors or sensor.
• - The signal wire is shorted to power.

1844

crankcase pressure sensor - circuit low

Short circuit to low voltage circuit of the crankcase pressure sensor

Does not affect performance

• - Breakage or short to ground of the signal wire in the wiring or sensor.
• - Open or short to ground of the power circuit.

1848

boost pressure sensor and air temperature sensor assembly - abnormal update rate

Intake manifold temperature sensor #1 does not change when the engine is running

The electronic control unit approximately calculates the temperature in the intake manifold

• - Sensor readings are fixed in one range.
• - High resistance in the sensor circuit.

1852

Water in fuel filter indicator - data above normal operating range, medium limit

Over water level detected in fuel filter

Does not affect performance

Water in the fuel filter

1887

NOx sensor downstream of emission control - circuit low

Short to low circuit NOx sensor circuit voltage at the outlet of the emission control system

engine may not start

• - The voltage supplied to the NOx sensor is below 18 V.
• - The voltage supplied to the NOx sensor is higher than 32 V.
• - NOx sensor
• - NOx sensor heater.
• - Wrong NOx sensor

1898

Turbocharger geometry change drive - out of adjustment range

When the ignition is turned on, the turbocharger geometry change actuator cannot perform automatic calibration

Low intake pressure. There is no open position of the turbine blade drive.

• - Incorrect installation of the drive on the turbocharger housing.
• - The presence of foreign particles can interfere with the movement of the blades when the ignition is turned on.

1911

Fuel pressure sensor 1 - data above normal operating range, high limit

The electronic control unit has determined that the pressure in the fuel accumulator is higher than the set value

No effect or possible noise associated with increased injection pressure (especially at idle or under light load) or a sharp decrease in power associated with pressure relief valve

• - Air in the fuel system.
• - Fuel filter.
• - Wiring and connectors.
• - fuel pressure sensor No. 1.
• - Fuel control valve.
• - High pressure fuel pipes.
• - Battery.

1938

Turbocharger Geometry Actuator, Output Signal Below Normal Operating Range, Medium Limit

Low voltage detected by turbocharger geometry change actuator

Does not affect performance

Voltage on the turbocharger geometry change drive is below 10 V

1942

crankcase pressure sensor - signal is different from the specified, intermittent or incorrect

The electronic control unit recorded invalid data from the crankcase pressure sensor when the ignition was turned ON or the engine was running

Does not affect performance

• - High resistance in the sensor circuit.
• - Sensor readings are fixed in one range.
• - the sensor is installed incorrectly.

1943

Ambient air density data below normal operating range, low limit

Engine torque has been reduced because vehicle is high above sea level

Possible reduction in engine performance

The car is high above sea level

1962

Turbocharger Geometry Actuator - Overheating, data above normal operating range, low limit

High turbocharger geometry change actuator internal temperature detected (above 125° for more than 30 minutes)

Does not affect performance

• - The turbocharger geometry change drive temperature is above 125° for more than 30 minutes.
• - Exhaust gas leaks in the turbocharger geometry change drive.

2182

Engine brake actuator 1 circuit high

Short to power supply of the engine brake drive circuit 1

The engine brake on cylinders #1, 2, 3 cannot be activated

• - Open circuit.
• - Short to power.
• - Electronic control unit.

2183

Engine brake actuator #1 circuit low

Engine brake actuator #1 circuit short to low voltage

The engine brake on cylinders #1, 2, 3 cannot be activated

Short to ground

2185

Sensor supply circuit 4 - high voltage

Short to power supply circuit No. 4 of the sensors.

High voltage detected in the power supply circuit of the accelerator pedal position sensor.

Idling only

Short to power

2186

Sensor supply circuit 4 - low voltage

Short circuit to the low voltage circuit of the sensor supply circuit 4.

Low voltage detected in the power supply circuit of the accelerator pedal position sensor.

Idling only

Short to ground

2198

Turbocharger geometry change actuator - root cause unknown

There is no communication between the turbocharger geometry change actuator and the electronic control unit.

The turbocharger geometry change actuator cannot correctly interpret the signal J19З9 from the electronic control unit.

Turbocharger geometry change drive disabled

• - Multiplex SAE J1939 tire.
• - Drive wiring for changing the geometry of the turbocharger.

2265

Fuel pump - circuit high

Short to power or open circuit of the fuel pump

Engine may be difficult to start

• - Open circuit.
• - Short to power.

2266

Fuel pump - circuit low

Fuel pump circuit short to low voltage

Engine may be difficult to start

• - Short circuit to ground.
• - Fuel freezing.
• - Jamming of the fuel pump rotor.

2271

EGR valve actuator - circuit high

Short to power in the EGR valve position sensor circuit

EGR valve position is ignored

• - Open ground circuit.
• - The signal wire is shorted to power.
• - EGR valve position sensor.
• - Electronic control unit.

2272

EGR valve actuator circuit low

EGR valve position sensor circuit short to low voltage

EGR valve position is ignored

• - Breakage or short circuit of the signal wire to ground.
• - Breakage or short circuit of the power wire to ground.
• - Sensor shorted to ground.

2288

Turbocharger shaft speed sensor

• - data above normal operating range, low limit

The electronic control unit detected a high speed of the turbocharger shaft

Engine power has been reduced to reduce turbocharger speed

The extremely high speed of the turbocharger shaft has been reduced by the electronic control unit

2311

Fuel control solenoid valve - condition

The resistance of the fuel control solenoid valve is too high or too low, or an intermittent loss of communication has been detected

engine will run unevenly with reduced power

• - Fuel control solenoid valve high resistance.
• - High resistance motor wiring.
• - ECM or fuel control solenoid valve leads are loose, worn, or oxidized.
• - Fuel control solenoid valve low resistance.
• - A short to ground in the valve or motor wires.

2321

Crankshaft position sensor - signal is different from the specified, intermittent or incorrect

Crankshaft Position Sensor Interruption

Possible misfires associated with switching from primary to secondary sensor operation.

Decrease in power as the engine is running using data from the auxiliary sensor.

• - Open or short circuit in the circuit, poor sensor connection.
• - The gap between the sensor and the rotor is too large or too small, or the ovality of the rotor is too large.

2322

camshaft position sensor - signal is different from the specified, intermittent or incorrect

Camshaft position sensor data transmission interruption

Does not affect performance

• - Open or short circuit in the circuit, poor sensor connection.
• - The gap between the sensor and the rotor is too large or too small, or the ovality of the rotor is too large.

2345

Turbo speed sensor - abnormal refresh rate

Sensor No. 1 of the turbocharger shaft speed shows an erroneous speed value

Does not affect performance. The electronic control unit approximately calculates the speed of the turbocharger shaft.

• - Sensor connection.
• - The gap between the sensor and the rotor is too large or too small.
• - turbocharger shaft speed sensor.

2346

Turbine upstream temperature - data above normal operating range, low limit

The temperature before the turbine is above the engine protection limit

Restriction of fuel supply in order to reduce the temperature at the turbine inlet

Engine power has been reduced to reduce the temperature ahead of the turbine

2347

Compressor outlet temperature data above normal operating range, low limit

The electronic control unit calculated the high temperature at the outlet of the compressor

Restriction of fuel supply in order to reduce the temperature at the outlet of the compressor

• - Air leaks that allow hot air from the engine compartment to enter the intake.
• - Invalid boost pressure data.
• - data on the high speed of the turbocharger shaft.
• - atmospheric pressure sensor.
• - The turbocharger is stuck.

2351

EGR valve actuator circuit low

EGR valve circuit short to low voltage

Power reduction possible. No power to EGR valve motor.

Short to ground

2352

Electropr EGR valve output - circuit high

EGR valve circuit shorted to power

Power reduction possible. No power to EGR valve motor.

Open or short to power

2357

EGR valve actuator - mechanical system does not respond or is out of adjustment

EGR valve actuator locked open

EGR valve motor disabled

• - EGR valve position sensor.
• - Damage (blocking or sticking) of the EGR valve actuator requires increased current to operate the valve

2363

Engine brake actuator 2 - circuit low

Short circuit to the low voltage circuit of the engine brake actuator 2

The engine brake on cylinders #4, 5, 6 cannot be activated

• - Short circuit to ground.
• - Electronic control unit.

2367

Engine brake actuator #2 circuit high

Engine Brake Driver #2 Circuit Shorted to Power

The engine brake on cylinders #4, 5, 6 cannot be activated

• - Open circuit.
• - Short to power.
• - Electronic control unit.

2369

Exhaust brake actuator circuit low

Short circuit to the low voltage circuit of the exhaust brake actuator

Does not affect performance

Short to ground

2371

Exhaust brake actuator - circuit high

Short to power supply of the mountain brake drive circuit

Does not affect performance

Short to power

2373

exhaust gas pressure sensor circuit high

Short to power supply of the exhaust gas pressure sensor circuit

Does not affect performance

• - Break in the ground wire in the harness, connectors or sensor.
• - The signal wire is shorted to power.

2374

exhaust gas pressure sensor - circuit low

Short circuit to the low voltage circuit of the exhaust pressure sensor circuit

Does not affect performance

• - Breakage or short to ground of the signal wire in the wiring or sensor.
• - Open or short to ground of the power circuit.

2377

Cooling fan motor circuit high

A short to power in the cooling fan motor circuit

Fan always on or not working

• - Open circuit of the cooling fan motor.
• - Short to power.
• - Electronic control unit.

2387

Turbocharger geometry change drive - mechanical system does not respond or is out of adjustment

The turbine blade drive controller has detected an invalid stop threshold or the drive is not moving to the closed position

Drive movement can be limited

Large charge air leaks

2398

outdoor temperature sensor - signal is different from the set, intermittent or incorrect

outdoor temperature sensor gives incorrect readings

The electronic control unit approximately calculates the outside temperature

• - Sensor readings are fixed in one range.
• - High resistance in the sensor circuit.
• - Electronic control unit.

2442

Injector 1 - no calibration

Incorrect injector correction code entered

Does not affect performance

Incorrect injector correction code entered

2443

Nozzle 2 - no calibration

Incorrect injector correction code entered

Does not affect performance

Incorrect injector correction code entered

2444

Nozzle 3 - no calibration

Incorrect injector correction code entered

Does not affect performance

Incorrect injector correction code entered

2445

Nozzle 4 - no calibration

Incorrect injector correction code entered

Does not affect performance

Incorrect injector correction code entered

2448

Coolant level sensor - data below normal operating range, low limit

Low coolant level detected

Does not affect performance

Low coolant level

2449

Turbocharger geometry change actuator - no calibration

When the ignition is turned on, the turbocharger geometry change actuator cannot perform automatic calibration

Low intake pressure. There is no open position of the turbine blade drive.

• - The drive for changing the geometry of the turbocharger is incorrectly installed.
• - The presence of foreign particles can interfere with the movement of the blades when the ignition is turned on.

2451

Exhaust gas temperature at the inlet to the tour binu - data above normal operating range, medium limit

The temperature before the turbine is above the engine protection limit

Restriction of fuel supply in order to reduce the temperature at the turbine inlet

• - Low boost pressure.
• - Engine power has been reduced to reduce the temperature ahead of the turbine.
• - Leaks in the exhaust gas recirculation (EGR) system.

2555

Heater 1

air inlet - circuit high

Intake air heater 1 circuit shorted to power

Intake air heater 1 always on or off

• - The signal wire is not connected to the intake air heater relay.
• - The ground wire is not connected to the intake air heater relay.
• - An open in the signal wire circuit of the intake air heater relay.
• - Open circuit in the ground wire of the intake air heater relay.
• - Shorting the signal wire to power.

2556

Inlet Air Heater 1 Circuit Low

Intake air heater 1 circuit short to low voltage

Intake air heater 1 always on or off

• - Short circuit in the relay.
• - Short circuit of the relay power wire to ground.

2634

Turbocharger geometry change actuator - control unit or component failure

Turbine blade drive controller internal error detected

Turbocharger geometry change drive disabled

Turbine blade drive controller internal error

2635

Turbocharger geometry change drive - status

Calibration mismatch between turbine blade drive controller and electronic control unit

Turbocharger geometry change drive disabled

Incorrect turbocharger geometry change actuator installed

2636

Turbocharger Geometry Change Actuator - Abnormal Update Rate

No J1939 communication between ECU and turbine blade drive controller

The actuator will move to the default open position

• - No power to the turbocharger geometry change drive from the electronic control unit.
• - Break in the ground wire of the drive for changing the geometry of the turbocharger.
• - Multiplex SAE J1939 tire.
• - Fast cyclic ignition on/off.
• - Electronic control unit.

2771

sensor downstream of the emission control system - abnormal update rate

No communication or incorrect data according to the J1939 protocol between the electronic control unit and the NOx sensor at the outlet of the emission control system

NOx sensor downstream of the emission control system is off

• - No power to the sensor from the electronic control unit.
• - Earth wire break.
• - An open or short circuit in the Multiplex SAE J1939 bus.
• - Electronic control unit.

2772

NOx sensor downstream of emission control - data above normal operating range, low limit

NOx content in exhaust gases above the recommended level

Does not affect performance

• - The amount of liquid of the toxicity reduction system is below the norm.
• - Fluid leaks from the toxicity control system in the dispenser or lines.
• - Damage to the dispenser nozzle.
• - High sulfur content in fuel.
• - The dispenser nozzle is partially or completely clogged.
• - The emission control catalyst is damaged or missing.

2773

Emissions downstream sensor - data above normal operating range, high limit

The content in the exhaust gases is above the recommended level

NOx sensor downstream of the emission control system is off.

Engine performance will be reduced, next time the vehicle speed will be reduced to 0.

• - The amount of liquid of the toxicity reduction system is below the norm.
• - Fluid leaks from the toxicity control system in the dispenser or lines.
• - Damage to the dispenser nozzle.
• - High sulfur content in fuel.
• - The dispenser nozzle is partially or completely clogged.
• - The emission control catalyst is damaged or missing.

2963

Coolant Temperature Sensor - Coolant Temperature Protection Low Limit

Coolant temperature is above normal

Power reduction. It is possible to stop the motor if the protective stop is enabled.

High coolant temperature

2964

boost pressure sensor and air temperature sensor assembly - data above the normal operating range, high limit

The intake manifold air temperature sensor signal indicates that the air temperature has exceeded the critical engine protection limit

Sequential power reduction depending on the time of the alarm activation

• - Charge air cooler fins clogged.
• - Increased resistance in the aftercooler.
• - Intercooler too small.
• - High temperature at the outlet of the compressor.

2973

boost pressure sensor and air temperature sensor assembly - signal is different from the specified, intermittent or incorrect

Intake manifold boost pressure sensor data is invalid when the ignition is switched on or while the engine is running

Indicator (MIL) illuminates and engine performance may decrease

• - boost pressure sensor and air temperature sensor assembly.
• - atmospheric pressure sensor.
• - Leaks between compressor and intake manifold.
• - Increased resistance in the aftercooler.
• - turbocharger shaft speed sensor.
• - air temperature sensor before the compressor.
• - Wiring damage.

2976

Emission control fluid dispenser temperature sensor - signal different from the specified, intermittent or incorrect

Emission Control System Fluid Dispenser Internal Error Detected

Emission system fluid is not being supplied to the emission system

Emission control fluid dispenser temperature sensor does not match other temperature sensors

3142

Temperature sensor at the inlet of the emission control system - high level in the circuit

Emissions Control Inlet Temperature Sensor Circuit Shorted to Power The Emission Control System Inlet Temperature Sensor Uses Default Value

• - Open ground circuit.
• - Open or short to power signal wire.

3143

Temperature sensor at the inlet of the emission control system - low level in the circuit

Short circuit to the low voltage circuit of the temperature sensor circuit at the inlet of the exhaust gas toxicity reduction system

Emission control system inlet temperature sensor default value

• - Signal wire short to ground.
• - Short circuit of the sensor to the ground wire or ground.

3144

Temperature sensor at the inlet of the exhaust gas toxicity reduction system - the signal is different from the specified one, intermittent or incorrect

The readings of the temperature sensor at the inlet of the exhaust gas toxicity reduction system do not change when the engine is running

Emission control system inlet temperature sensor default value

• - Sensor readings are fixed in one range.
• - High resistance in the sensor circuit.

3145

Emission Control System Catalyst Inlet Temperature Sensor - Abnormal Refresh Rate

Temperature sensor readings at the catalyst inlet of the exhaust gas reduction system do not change when the engine is running

Emission Control System Catalyst Temperature Sensor Default Value

• - Sensor readings are fixed in one range.
• - High resistance in the sensor circuit.

3146

Temperature sensor at the outlet of the emission control system - high level in the circuit

Short to power supply of the temperature sensor circuit at the outlet of the exhaust gas emission reduction system

Emissions system outlet temperature sensor default value

• - Break in the ground wire in the harness, connectors or sensor.
• - Open or short to power signal wire.

3147

Emission Control System Outlet Temperature Sensor Circuit Low

Short circuit to the low voltage circuit of the temperature sensor circuit at the outlet of the emission control system

Emissions system outlet temperature sensor default value

• - Signal wire short to ground.
• - Short to earth wire or signal wire ground.

3149

Emission Control System Outlet Temperature Sensor - Abnormal Refresh Rate

Temperature sensor readings at the outlet of the reduction system exhaust gases do not change when the engine is running

Emissions system outlet temperature sensor default value

• - Sensor readings are fixed in one range.
• - High resistance in the sensor circuit.

3151

Emissions Control Catalyst - Not Detected

No emission control catalyst found in the exhaust system

Emission system fluid is not being supplied to the emission system

• - Wrong calibrations.
• - The emission control catalyst is damaged or missing.

3163

temperature sensor at the inlet of the emission control system - replacement, no calibration

Temperature sensors at the inlet and outlet of the emission control system have been replaced

Emission system fluid is not being supplied to the emission system

When installing, the connectors of the inlet and outlet sensors were reversed

3164

Emission Control System Inlet Temperature Sensor - Data Above Normal Operating Range, Low Limit

Emission control system inlet high temperature detected

Possible reduction in engine performance

High temperature at the inlet of the emission control system

3236

Emission Control System Outlet Temperature Sensor - Data Above Normal Operating Range, Medium Limit

Emission control system outlet high temperature detected

Emission system fluid is not being supplied to the emission system

High temperature at the outlet of the emission control system

3237

Emission Control Fluid Line Heater 1 Circuit High

Short to power supply of the heater circuit 1 of the emission control fluid lines

Emissions control fluid line heater 1 disabled

• - Heater.
• - Short to power.
• - Electronic control unit.

3238

Emission Control Fluid Line Heater 1 - Circuit Low

Short circuit to the low voltage circuit of the heater circuit 1 of the liquid lines of the emission control system

Emissions control fluid line heater 1 disabled

• - Heater.
• - Heater relay.
• - Short circuit to ground.
• - Electronic control unit.

3239

Emissions Control Fluid Line Heater 2 - Circuit High

Short to power supply of the heater circuit of 2 emission control fluid lines

Emission Control Fluid Line Heater 2 Off

• - Heater.
• - Short to power supply of the wiring of the dispenser control unit.
• - Dispenser control unit.

3242

Emission control system fluid heater - mechanical system not responding or out of adjustment

Emission control fluid temperature does not rise when the emission control fluid reservoir heater is on signal

Does not affect performance. If the emission control fluid freezes, it may not be able to flow into the emission control system.

• - Tank heater control valve remains locked in closed position.
• - Blocking or narrowing of the coolant channel in the reservoir heater.
• - Low coolant level.
• - Tank heater control valve.
• - There is no signal to turn on the tank heating from the dispenser control unit.

3258

Emission Control Fluid Line Heater 1 - Circuit Low

Short circuit to the low voltage circuit of the heater circuit 1 of the liquid lines of the emission control system

Emissions control fluid line heater 1 disabled

• - Heater.
• - Heater relay.
• - Open circuit or short to ground or blown fuse in the dispenser control circuit.
• - Dispenser control unit.

3261

Emission Control Fluid Line Heater 2 - Circuit Low

Short circuit to the low voltage circuit of the heater circuit 2 of the emission control fluid lines

Heater 2 fluid lines of the exhaust emission control system gases off

• - Heater.
• - Heater relay.
• - Open circuit or short to ground or blown fuse in the dispenser control circuit.
• - Dispenser control unit.

3326

SAE J1939 Accelerator Pedal Position Sensor Abnormal Refresh Rate

The electronic control unit is waiting for a signal from the accelerator pedal position sensor, but does not receive it quickly enough, or does not receive it at all

engine only idling

Multiplex SAE J1939 tire

3382

Exhaust gas recirculation system data below normal operating range, medium limit

Measured EGR is less than the specified value

Possible reduction in engine performance

• - Leaks or obstruction in the flow of exhaust gases of the EGR system.
• - EGR valve internal leaks.
• - The EGR valve is locked in the closed position.
• - differential pressure sensor of the EGR system.

3383

Exhaust gas recirculation system data above normal operating range, medium limitation

Measured EGR is greater than the set value

Possible reduction in engine performance

• - Throttle actuator.
• - EGR valve leaks.
• - air flow sensor.

3422

Emissions control fluid heater 3 lines - circuit high

Short to power in the heater circuit of 3 emission control fluid lines

Emissions Control Fluid Line Heater 3 Disabled

• - Heater.
• - Short to power supply of the wiring of the dispenser control unit.
• - Dispenser control unit.

3425

Emission Control Fluid Line Heater 3 - Circuit Low

Short to ground or open circuit in heater 3 emission control fluid lines

Emissions Control Fluid Line Heater 3 Disabled

• - Heater.
• - Heater relay.
• - Short circuit to ground.
• - Dispenser control unit.

3426

Heater 4 Emissions Fluid Lines - Circuit High

Short to power in the heater circuit of 3 emission control fluid lines

Emission Control Fluid Line Heater 4 Disabled

• - Heater.
• - Short circuit to power supply in the dispenser control unit circuit.
• - Dispenser control unit.

3429

Heater 4 Emission Control Fluid Lines - Circuit Low

Short to ground or open circuit in the heater of 4 emission control fluid lines

Emission Control Fluid Line Heater 4 Disabled

• - Heater.
• - Open or short to ground in the dispenser control unit circuit.
• - Dispenser control unit.

3539

Throttle actuator motor circuit high

Short to power throttle position sensor circuit

Power reduction possible.

The throttle motor will not be powered.

• - Open ground circuit.
• - Ground signal wire to power.
• - throttle position sensor.
• - Electronic control unit.

3541

Throttle actuator motor - circuit low

Throttle position sensor circuit short to low voltage

Power reduction possible.

The throttle motor will not be powered.

• - Open or short to ground signal wire.
• - Break or short to ground of the power wire.
• - Sensor shorted to ground.

3542

Throttle actuator motor - signal is different from the specified, intermittent or incorrect

Incorrect data is being received from the throttle position sensor or the position of the throttle actuator does not change when the engine is running

Possible reduction in engine performance

• - Periodic open or short circuit in the wiring.
• - throttle position sensor.
• - Throttle actuator motor blocked or damaged.
• - Electronic control unit.

3548

Emission Control Fluid Dispenser - No Primary Injection

Dispenser unable to perform primary injection sk

Emission system fluid is not being supplied to the emission system

• - Low level of liquid of the toxicity control system in the reservoir.
• - Low air pressure in the dispenser.
• - Air filter lines clogged or restricted.
• - The emission control system dosing lines are blocked, constricted, frozen or leaking.
• - the dispenser is air-tight through a loose or damaged connector or line.

3557

Emission Control Fluid Dispenser Control Unit

• - the signal is different from the given one, intermittent or incorrect

The Emission Control Fluid Dispenser Control Unit has detected a too high or too low signal level

Emission system fluid is not being supplied to the emission system

Emission Control Fluid Dispenser Control Unit

3558

Emission Control Fluid Dispenser - Circuit High

Short circuit to the power supply of the control unit of the liquid dispenser of the toxicity reduction system

Emission system fluid is not being supplied to the emission system

• - Short circuit to the power supply of the liquid dispenser of the toxicity reduction system.
• - Short circuit to the power supply of the dispenser control unit circuit.
• - Dispenser control unit.

3559

Emission Control Fluid Dispenser - Circuit Low

Short circuit to the low voltage circuit of the control unit of the liquid dispenser of the toxicity reduction system

Emission system fluid is not being supplied to the emission system

• - Short circuit to the mass of the liquid dispenser of the toxicity reduction system.
• - Short circuit to ground in the dispenser control unit circuit.
• - Dispenser control unit.

3561

Emission Control Fluid Dispenser - Circuit Low

Open circuit in the dispenser

Emission control system fluid Emission control system fluid is not supplied to the emission control system

• - Break in the dispenser circuit.
• - Break in the chain of the dispenser control unit.
• - Dispenser control unit.

3562

Emissions Control Fluid Line Heater Relay Circuit High

Emissions control fluid line heater relay circuit shorted to power

Heaters 1, 2, 3 Emission Control Fluid Lines Disabled

• - Heater relay circuit shorted to power.
• - Short circuit to the power supply of the dispenser control unit circuit.
• - Dispenser control unit.

3563

Emissions Control Fluid Line Heater Relay Circuit Low

A short circuit to the low voltage circuit of the heater relay circuit of the liquid lines of the emission control system

Heaters 1, 2, 3 Emission Control Fluid Lines Disabled

• - Heater relay circuit shorted to ground.
• - Short circuit to ground in the dispenser control unit circuit.
• - Dispenser control unit.

3564

Emissions Control Fluid Line Heater Relay - Low Amp

An open circuit or low current in the Emission Control Fluid Line Heater Relay Circuit

Heaters 1, 2, 3 Emission Control Fluid Lines Disabled

• - An open in the heater relay circuit.
• - Break in the chain of the dispenser control unit.
• - Dispenser control unit.

3565

Emission control system fluid metering valve - circuit high

Short circuit to the supply of the valve of the liquid dispenser of the exhaust gas toxicity reduction system

Emission system fluid is not being supplied to the emission system

• - Short circuit to the supply of the dispenser valve circuit.
• - Short circuit to the power supply of the dispenser control unit circuit.
• - Dispenser control unit.

3566

Emission Control System Fluid Metering Valve - Circuit Low

Short circuit to the supply of the valve of the liquid dispenser of the exhaust gas toxicity reduction system

Emission system fluid is not being supplied to the emission system

• - Short circuit to ground of the dispenser valve circuit.
• - Short circuit to ground in the dispenser control unit circuit.
• - Dispenser control unit.

3567

Emission Control Fluid Metering Valve - Low Current

Open circuit or low current in the emission control fluid metering valve circuit

Liquid current reduction system toxicity is not fed into the toxicity reduction system

• - Break in the dispenser valve circuit.
• - Break in the chain of the dispenser control unit.
• - Dispenser control unit.

3568

Emission Control System Fluid Dosing Valve - Mechanical System Not Responding or Cannot Be Adjusted

A mechanical failure of the emission control fluid dosing valve has been detected

Emission system fluid is not being supplied to the emission system

Emission control fluid dosing valve

3569

Emission control fluid dosing lines

A violation of the liquid supply of the exhaust gas toxicity reduction system has been detected

Emission system fluid is not being supplied to the emission system

• - The dispenser nozzle is blocked or partially clogged.
• - Dispenser nozzle lines blocked or narrowed.
• - Dispenser control unit.

3571

Emission Control Fluid Pressure Sensor Circuit High

Short to power supply of the fluid pressure sensor circuit of the emission control system

Emission system fluid is not being supplied to the emission system

• - Shorting the signal wire to power.
• - Wiring control unit of the dispenser.
• - Dispenser control unit.

3572

Emissions Control Fluid Pressure Sensor Circuit Low

Short circuit to the low voltage circuit of the fluid pressure sensor circuit of the emission control system

Emission system fluid is not being supplied to the emission system

• - Shorting the signal wire to ground.
• - Wiring control unit of the dispenser.
• - Dispenser control unit.

3574

Emission Control System Fluid Pressure Sensor - Data Below Normal Operating Range, Medium Limit

The dispenser detected low pressure of the emission control fluid

Emission system fluid may not be supplied to the emission system

• - Low level of liquid of the toxicity control system in the reservoir.
• - The emission control system dosing lines are blocked, constricted or frozen.
• - The emission control system fluid reservoir filter is blocked or clogged.
• - Emission system fluid dispenser filter is blocked or clogged.
• - Emission system fluid line connectors blocked or clogged.
• - The emission control fluid is contaminated.
• - fluid dispenser of the toxicity reduction system.

3575

Emission Control System Fluid Pressure Sensor - Data Above Normal Operating Range, Medium Limit

The dispenser detected a blockage in the liquid return line of the emission control system

Emission system fluid may not be supplied to the emission system

• - Emission control system fluid return blocked or restricted.
• - fluid dispenser of the toxicity reduction system.

3576

Emission Control Fluid Reservoir Heater Circuit Low

Open circuit of the control valve of the heater of the fluid reservoir of the emission control system

Emissions system fluid reservoir heater disabled

• - Open circuit of the dispenser control unit.
• - Tank heater control valve.
• - Dispenser control unit.

3577

Emission Control Fluid Check Valve Circuit High

Emissions control system fluid return valve shorted to power

The emission control fluid check valve is disabled. The emission control system is not cleaned.

• - Emission control fluid check valve.
• - Wiring and connectors.

3578

Emission Control Fluid Check Valve Circuit Low

Emission control fluid check valve short to low voltage

The emission control fluid check valve is disabled. The emission control system is not cleaned.

• - Emission control fluid check valve.
• - Posting and connectors.

3579

Emission Control Fluid Check Valve - Low Amp

Emission control fluid check valve open circuit

The emission control fluid check valve is disabled. The emission control system is not cleaned.

• - Emission control fluid check valve.
• - Wiring and connectors.

3596

Emissions system fluid pressure sensor - signal is different from the specified, intermittent or incorrect

Emissions control fluid pressure sensor readings too high or too low

Emission system fluid is not being supplied to the emission system

• - Leaks in the emission control fluid lines.
• - fluid dispenser of the toxicity reduction system.

3597

Emission Control Fluid Dispenser Control Unit

• - abnormal refresh rate

Communication between the ECM and the emission control fluid dispenser control unit has been interrupted

Emission system fluid is not being supplied to the emission system

• - No power to the control unit of the liquid dispenser of the toxicity reduction system.
• - There is no mass on the control unit of the emission control fluid dispenser.
• - Multiplex SAE J1939 tire.
• - Dispenser control unit.

3598

Emission Control Fluid Dispenser Control Unit

• - received data error

Data received by the ECM from the Emission Control Fluid Dispenser Control Unit is unreadable or missing

Emission system fluid is not being supplied to the emission system

• - Electronic control unit.
• - Engine calibrations are broken.
• - Dispenser control unit.
• - Calibration of the dispenser control unit is violated.
• - The presence of active engine codes or emission control system sensors that send data necessary to control the emission control fluid dosing.

3612

Emission System Fluid Dispenser - Mechanical System Not Responding or Cannot Be Adjusted

Incomplete power off detected in the emission control system

Does not affect performance

After stopping the engine, the cleaning cycle of the elements of the emission control fluid was not completed

3616

Turbine blade change actuator position sensor - mechanical system not responding or cannot be adjusted

The vane position actuator control has detected incorrect stop limits or the actuator cannot move to the closed position

The change in the position of the blades can be limited

• - The turbocharger blades have not taken the required position.
• - Large charge air leaks.

3648

Emission Control System Fluid Dispenser Control Unit Temperature Sensor Above Normal Operating Range, Medium Limit

The temperature inside the control unit of the emission control fluid dispenser is above the permissible limits

Emission system fluid is not being supplied to the emission system

• - Incorrect air flow direction of the dispenser control unit cooling air.
• - Incorrect installation of the dispenser control unit.
• - Dispenser control unit.

3651

Emission Control Fluid Reservoir Temperature Sensor - Below Normal Operating Range, Medium Limit

The temperature in the emission control system fluid reservoir does not reach the desired value

Emission system fluid is not being supplied to the emission system

• - Blocking or narrowing of the coolant channel in the reservoir heater.
• - The coolant hose for heating the emission control fluid reservoir is disconnected or damaged.
• - Tank heater control valve remains locked in closed position.
• - temperature sensor of the liquid tank of the toxicity reduction system.
• - Work at very low ambient temperature.

3679

Emission Control Fluid Dispenser - Root Cause Unknown

Error initializing the control unit of the liquid dispenser of the toxicity reduction system

Emission system fluid is not being supplied to the emission system

• - Open or short circuit.
• - fluid dispenser of the toxicity reduction system.

3681

NOx sensor power supply at the output of the emission control system - the signal is different from the specified, intermittent or incorrect

The value of the sensor supply does not correspond to the nominal value

Does not affect performance

• - Short circuit to power or ground.
• -sensor

3697

Electronic control unit - memory calibration

Internal error of the electronic control unit associated with a software failure

engine may not start

Electronic control unit

3713

Emissions system fluid line heater relay - mechanical system not responding or cannot be adjusted

Short circuit to the power supply of the heater circuit of the liquid lines of the emission control system

Heaters 1,2,3 liquid lines of the emission control system are disabled

• - The heater relay is permanently closed.
• - Short to power wiring between the relay and the heater.

3726

NOx sensor upstream of the emission control system - data above normal operating range, medium limit

Emission System Fluid Dispenser Cannot Comply with Fluid Request for Adequate NOx Reduction

Does not affect performance

Emission Control Fluid Dispenser

3735

SAE J1939 data feed - abnormal update period

Communication lost between ECU and other devices via SAE J1939 data link

Engine speed will gradually decrease and remain at idle

• - SAE J1939 data bus.
• - External control unit for vehicle accessories.
• - Electronic control unit.

3736

Emission Control Fluid Dispenser Control Unit - Root Cause Unknown

Unscheduled communication between the ECM and the emission control fluid dispenser control unit

Emission system fluid is not being supplied to the emission system

• - SAE J1939 data bus.
• - Electronic control unit.
• - Engine calibrations are broken.
• - Dispenser control unit.
• - Calibration of the dispenser control unit is violated.

3749

sensor at the outlet of the toxicity reduction system - the data is irrational, a big difference

NOx sensor data at the output of the emission control system does not change when the engine is running

Does not affect performance

• - NOx sensor removed.
• - NOx sensor

3866

Emission control system fluid level sensor - data above normal operating range, high limit

Emission control system fluid level is below the limit

Engine torque will be automatically reduced after 36 hours

• - Wrong emission control fluid.
• - liquid level sensor of the toxicity reduction system.
• - diesel fuel in the tank of the liquid emission reduction system.

3867

Emission control system fluid level sensor - data above normal operating range, medium limit

Emission control system fluid level is below the limit

Engine torque will be automatically reduced after 36 hours

• - Wrong emission control fluid.
• - liquid level sensor of the toxicity reduction system.

3868

Emission Control Fluid Level Sensor Abnormal Update Rate

There is no communication between the electronic control unit and the liquid level sensor of the toxicity reduction system via the J1939 bus

Engine torque will be automatically reduced

• - No power supply to the liquid level sensor of the toxicity reduction system.
• - Break in the ground wire of the liquid level sensor of the toxicity reduction system.
• - An open or short circuit in the SAE J1939 bus circuit between the sensor and the electronic control unit.
• - Periodically there is no communication on the SAE J1939 bus between the sensor and the electronic control unit.

3876

Emission control fluid level sensor - mechanical system not responding or cannot be adjusted

Emission control system fluid level sensor does not detect fluid

Engine torque will be automatically reduced after 36 hours

• - Emission control system fluid level sensor not installed correctly.
• - Low level emission control fluid.
• - liquid level sensor of the toxicity reduction system.
• - Emission control fluid includes other fluids (diesel, coolant, oil, etc.).
• -The tank is filled with water.
• - The temperature of the liquid is outside the measurement range of the liquid level sensor of the toxicity reduction system.