JCB Common Rail Fault Codes List

The electronic engine control unit (ECU) and the devices connected to it are distinguished by their robustness and inherently more reliable than connecting wires and connectors.

BEFORE checking or replacing electrical devices, make sure that the correct wires and connectors are installed and that they are functioning properly. In many cases, electrical faults are easily rectified by identifying faulty wires,

connectors or grounding points. Before carrying out work, it is necessary to disconnect the electrical system by disconnecting the battery. Check the appropriate machine documentation for the correct procedure.

1 WIRING HARNESS - Visually inspect connecting wires and connectors for signs of damage.

Check the following aspects:

a Shabby wires - intermittent short circuits.

b Cut wires - open circuits. The probable cause is the penetration of wires into the mechanical mechanisms of the machine.

c Broken wires - open circuits. The probable cause is improper routing or bundling of wires without sufficient slack to move the machine.

d Fused wires - intermittent short circuits. The probable cause is contact with the turbocharger or exhaust system.

2 CONNECTORS - Visually inspect the corresponding connectors. Check the following aspects:

a Connection - intermittent short circuits. Make sure the connectors are properly connected and that their locking mechanisms are locked.

b Damage - intermittent open circuit or short circuits. Inspect the connectors for signs of physical damage (such as broken housings or retaining clips). Connectors may melt if they come into contact with a hot exhaust system or turbocharger. Disconnect the connectors and inspect the pins for damage (such as corroded, bent, or broken pins). DO NOT TOUCH the connector pins on the electronic engine control unit (ECU). Broken connectors must be replaced.

Contamination - intermittent open circuit or short circuit. Disconnect the connectors and inspect the inside for contamination (usually water, oil, or hydraulic fluid). If necessary,

clean the pins of the connector and the socket with a cotton swab or similar. DO NOT TOUCH the connector pins on the electronic engine control unit (ECU). If there are clear signs of water contamination, the connectors must be allowed to dry completely before connecting. Inspect all sealing elements carefully for signs of contamination or damage.

3 Grounding Points - Locate grounding points on the engine and machine. Make sure the wire terminals are connected correctly.

Fault codes - structure

The structure of the trouble codes, also known as Diagnostic Trouble Codes (DTCs), has been standardized and represented by a 7-digit code for all road and off-road cars and vehicles. According to the standard (called J2012), all DTCs must follow the structure below.

1st character - defines the vehicle system (for example, P = power train, C = chassis, U = network)

2nd and 3rd characters - define the subsystem (transmission, CAN network, brakes, etc.)

4th and 5th characters - identify a specific component, circuit or fault (e.g. starter relay)

The 6th and 7th characters are called Fault Type Bytes (FTB) and indicate a specific fault (eg 11 = short to ground). For a complete list, see FTB Numbers below.

Some special trouble codes are defined by an international standard, while others may be defined by individual vehicle manufacturers.

Depending on the specification of the machine, there are several ways to access and display the fault codes that are recorded by the engine ECU:

CAN bus display

The machine can be equipped with a CAN bus display. This display can show all registered codes, eg P0047. All registered codes will be displayed. The operator may have the option to erase the fault code log. For more information, refer to the relevant machine documentation.

Computer connected to CAN bus

The logged error codes can be accessed using a suitable laptop equipped with appropriate diagnostic software such as the JCB 444 Engine Diagnostics. The computer must be connected to the vehicle's CAN bus using a data adapter (DLA).

Once connected, all registered codes can be displayed. The engineer also has the option to erase the fault code log.

JCB Diagnostic trouble Codes list Download

Fault Type Byte Numbers (FTB)

00 No subtype information

02 General fault with signal

04 Internal system malfunction (ECU)

07 Mechanical failure

05 System programming malfunction

09 Component malfunction

11 Short to ground (SC2G)

12 Short to battery (SC2VBAT)

13 Open circuit (OC)

16 Circuit voltage below acceptable threshold

17 Circuit voltage above acceptable threshold

18 Circuit current below the permissible threshold

19 Circuit current above the permissible threshold

1A Circuit Resistance Above Acceptable Threshold

1B Circuit resistance below acceptable threshold

1C Circuit voltage out of range

1F Intermittent circuit operation

23 Permanently low signal

24 Constantly high signal

26 The rate of change of the signal is below the permissible threshold value

27 The rate of change of the signal is higher than the permissible threshold value

29 Invalid signal

2F Intermittent signal

31 No signal (missing / missing)

36 Signal frequency too low

37 Signal frequency too high

38 Wrong signal frequency

45 Malfunction of program memory

46 Calibration / parameter memory fault

47 Malfunction of the self-monitoring system / microcontroller / microprocessor

4B Overtemperature

54 No calibration

64 Signal Acceptance Malfunction

62 Signal comparison fault

72 Actuator stuck open

73 Actuator stuck closed

71 The actuator is stuck

81 Received network data contains error

85 Signal out of range

86 Invalid CAN signal

88 BUS OFF

9A Component or system operating conditions

92 Performance or malfunction

96 Component malfunction or internal malfunction

97 Component or system operation is difficult or blocked

98 Overtemperature of a component or system

When a malfunction is detected, the ECU determines the severity of the malfunction and can take measures to protect the engine or machine from potential damage.

The ECU can take one of the following four actions

Inaction

The ECU has determined that there is no immediate risk to the engine or machine, and that the engine is operating normally, however, remedial action should be taken as soon as possible.

Reduced torque mode:

The power output of the motor has been reduced to reduce motor voltages and temperatures and to minimize motor damage. The machines should be stopped as soon as possible to prevent further damage.

Emergency mode of movement to the place of repair work:

Engine power output is limited and engine speed is reduced to reduce engine voltages and temperatures and to minimize engine damage. Machines should be stopped as soon as possible to prevent further damage.

Engine shutdown / delayed engine shutdown

The engine ECU automatically shuts down the engine to prevent impending engine failure.

Fault codes - numeric list

P0001 Fuel volume regulator control circuit open

P0002 Range / Performance of the Fuel Volume Regulator Control Circuit

P0003 Low signal of the control circuit of the fuel volume regulator

P0004 High signal of the control circuit of the fuel volume regulator

P0016 Relationship between crankshaft position and camshaft position

P0087 Too low pressure in the fuel line / system

P0088 Too high pressure in the fuel line / system

P0089 Fuel Pressure Regulator 1 Performance

P0090 Fuel pressure regulator 1 control circuit open

P0091 Low signal of the control circuit of the fuel pressure regulator 1

P0092 High signal of the control circuit of the fuel pressure regulator 1

P0095 Intake Air Temperature Sensor 2 Circuit

P0096 Intake Air Temperature Sensor 2 Circuit Range / Performance

P0097 Low intake air temperature sensor 2 circuit

P0098 High intake air temperature sensor 2 circuit

P0099 Intermittent / unstable intake air temperature sensor 2 circuit signal

P0105 Manifold Absolute Pressure / Barometric Pressure Circuit

P0106 Manifold Absolute Pressure / Barometric Pressure Circuit Range / Performance

P0110 Intake Air Temperature Sensor 1 Circuit

P0111 Low intake air temperature sensor 1 circuit

P0124 High intake air temperature sensor 1 circuit

P0113 High intake air temperature sensor 1 circuit

P0115 Circuit 1 of the engine coolant temperature sensor

P0116 Coolant Temperature Sensor Circuit 1 Range / Performance engine

P0117 Low signal circuit 1 of the engine coolant temperature sensor

P0118 High signal circuit 1 of the engine coolant temperature sensor

P0120 Throttle / Pedal Position Sensor / Switch A Circuit

P0121 Throttle / Pedal Position Sensor / Switch Circuit Range / Performance

P0180 Circuit "A" of the fuel temperature sensor

P0181 Range / Performance of the fuel temperature sensor circuit "A"

P0182 Low signal circuit "A" of the fuel temperature sensor

P0183 High signal circuit "A" fuel temperature sensor

P0190 Circuit "A" of the fuel pressure sensor in the line

P0191 Range / performance of the circuit "A" of the fuel pressure sensor in the line

P0192 Low signal circuit "A" of the fuel pressure sensor in the line

P0193 High signal circuit "A" of the fuel pressure sensor in the line

P0194 Intermittent / unstable signal of the circuit "A" of the fuel pressure sensor in the line

P0200 Injector circuit open

P0201 Injector circuit open - 1st cylinder

P0202 Injector circuit open - 2nd cylinder

P0203 Injector circuit open - 3rd cylinder

P0204 Injector circuit open - 4th cylinder

P0205 Injector circuit open - 5th cylinder

P0206 Injector circuit open - 6th cylinder

P0218 Transmission Fluid Temperature Excess Condition

P0220 Circuit "B" of the sensor / switch of the throttle / pedal position

P0236 Range / Performance of the turbocharger / supercharger boost sensor circuit "A"

P0252 Fuel pump fuel metering range / performance "A" (cam / rotor / injector)

P0253 Low signal "A" of the fuel metering device of the high pressure fuel pump

(camshaft / rotor / injector)

P0254 High signal "A" of the fuel metering pump of the fuel pump (cam / rotor / injector)

P0261 Low signal of the injector circuit of the 1st cylinder

P0262 High signal of the injector circuit of the 1st cylinder

P0263 Contribution / balancing of the 1st cylinder

P0264 Low signal of the injector circuit of the 2nd cylinder

P0265 High signal of the injector circuit of the 2nd cylinder

P0266 Contribution / balancing of the 2nd cylinder

P0267 Low signal of the injector circuit of the 3rd cylinder

P0268 High signal of the injector circuit of the 3rd cylinder

P0269 Contribution / balancing of the 3rd cylinder

P0270 Low signal of the injector circuit of the 4th cylinder

P0271 High signal of the injector circuit of the 4th cylinder

P0272 Contribution / balancing of the 4th cylinder

P0273 Low signal of the injector circuit of the 5th cylinder

P0274 High signal of the injector circuit of the 5th cylinder

P0275 Contribution / balancing of the 6th cylinder

P0276 Low signal of the injector circuit of the 6th cylinder

P0277 High signal of the injector circuit of the 6th cylinder

P0278 Contribution / balancing of the 6th cylinder

P029A The balancing of the 1st cylinder by fuel production is at the maximum limit meaning

P029B Balancing of the 1st cylinder by fuel production is at the minimum limit meaning

P029E Balancing of the 2nd cylinder with fuel production is at the maximum limit meaning

P029F Balancing of the 2nd cylinder with fuel production is at the minimum limit meaning

P02A2 The balancing of the 3rd cylinder by fuel production is at the maximum limit meaning

P02A3 The balancing of the 3rd cylinder by fuel production is at the minimum limit meaning

P02A6 Balancing of the 4th cylinder by fuel production is at the maximum limit meaning

P02A7 Balancing of the 4th cylinder with fuel production is at the minimum limit meaning

P02A8 The balancing of the 5th cylinder by fuel production is at the maximum limit meaning

P02A9 Balancing of the 5th cylinder with fuel production is at the minimum limit meaning

P02A10 Balancing of the 6th cylinder by fuel production is at the maximum limit meaning

P02A11 Balancing of the 6th cylinder with fuel production is at the minimum limit meaning

P02EE 1st Cylinder Injector Circuit Range / Performance

P02EF Range / Performance of the 2nd cylinder injector circuit

P02F0 3rd cylinder injector circuit range / performance

P02F1 4th cylinder injector circuit range / performance

P02F2 5th cylinder injector circuit range / performance

P02F3 6th cylinder injector circuit range / performance

P0335 Crankshaft Position Sensor A Circuit

P0340 Camshaft Position Sensor A Circuit

P0341 Camshaft Position Sensor A Circuit Range / Performance

P0371 Excessive number of pulses "A" high-resolution signal time stamps

P0372 Too few pulses "A" high-resolution signal time stamps

P0374 Lack of pulses "A" high-resolution signal time stamps

P0500 "A" vehicle speed sensor

P0501 Vehicle speed sensor "A" range / performance

P0503 Intermittent / intermittent / high signal "A" of the vehicle speed sensor

P0520 Low Oil Pressure Indicator Light Control Circuit

P0521 Engine oil pressure sensor / switch range / performance

P0522 High oil pressure

P0523 Low oil pressure

P0560 System Voltage

P0562 Low system voltage

P0563 System Voltage High

P0566 Signal "off" ("Off") cruise control

P0567 Signal "resume" ("Resume") cruise control

P0569 Signal "coasting" ("Coast") cruise control

P0570 Signal "acceleration" ("Accelerate") cruise control

P0575 Cruise Control Input Circuit

P0602 Control module programming error

P0603 Standby memory error (KAM) of the internal control module

P0604 Error in random access memory (RAM) of the internal control module

P0605 Read-only memory (ROM) error of the internal control module

P0606 Functional malfunction of the security system

P0607 Functional malfunction of the security system

P060A Functional malfunction of the security system

P060B Functional malfunction of the security system

P0612 Engine speed relay control circuit

P0615 Starter Relay Circuit

P0616 Low signal starter relay circuit

P0617 Starter relay circuit high

P061B Functional malfunction of the security system

P061C Functional malfunction of the security system

P061E Functional malfunction of the security system

P0627 Global fuel supply pump malfunction - open circuit

P0628 Global fuel priming pump malfunction - short to ground

P0629 Global fuel priming pump malfunction - short circuit to battery

P062B Functional malfunction of the security system

P062D Fuel Injector Control Circuit Performance

P062E Fuel Injector Control Circuit Performance

P062F Internal control module EEPROM error

P0630 VIN code not programmed or incompatible - ECM / PCM

P0641 Circuit "A" of the reference voltage of the sensor is open

P0650 Malfunction Indicator Light (MIL) Control Circuit

P0651 Circuit "B" of the reference voltage of the sensor is open

P0655 Malfunction Check Engine Light (CEL)

P0656 Fuel level sensor output circuit

P0668 Low signal circuit "A" of the internal temperature sensor PCM / ECM / TCM

P0669 High signal circuit "A" of the internal temperature sensor PCM / ECM / TCM

P0685 ECM / PCM Power Relay Control Circuit Open

P0697 Circuit "C" of the reference voltage of the sensor is open

P1101 Positive malfunction of the line pressure regulation error

P1102 Negative malfunction of the line pressure regulation error

P1103 Malfunction of pressure in the line

P1104 Injector update malfunction

P1105 Injector update malfunction

P1106 Injector update malfunction

P1107 Injector update malfunction

P1108 Injector update malfunction

P1109 Injector update malfunction

P110A Injector update malfunction

P110B Injector update malfunction

P1500 Malfunction of a foot throttle / pedal - emergency mode of movement to the place of repair work

P1501 Foot Throttle / Pedal Malfunction - Reduced Torque Mode

P1503 Hand throttle malfunction - emergency mode of movement to the venue renovation works

P1504 Manual Throttle Malfunction - Low Torque Mode

P1506 Global throttle / pedal malfunction - emergency travel to place repair work

P1509 CAN bus communication error with TSC

P1602 Global Starter Relay Control Circuit

P1603 Functional malfunction of the security system

P1604 Functional malfunction of the security system

P1605 Functional malfunction of the security system

P1606 Functional malfunction of the security system

P2120 Malfunction of channel 1 of the hand pedal signal

P2125 Malfunction of channel 2 hand pedal signal

P2135 Comparison of voltage "A" / "B" sensor / switch throttle / pedal position

P2138 Hand Pedal Signal Mapping Malfunction

P2147 Malfunction (cut off) of the injector voltage source

P2148 Malfunction (cut off) of the injector voltage source

P2226 Barometric Pressure Sensor A Circuit

P2228 Low signal circuit "A" of the barometric pressure sensor

P2229 High signal circuit "A" of the barometric pressure sensor

P2264 Water-in-fuel sensor circuit

P2265 Water in Fuel Sensor Circuit Range / Performance

P2266 Low signal of the water-in-fuel sensor circuit

P2267 High signal circuit of the sensor for the presence of water in fuel

P2269 Water in fuel condition

P250B Engine Oil Level Sensor Circuit Range / Performance

P256A Idle Speed Selector Switch / Sensor Circuit open

P256B Range / Performance of Speed Selector Switch / Sensor engine idling

P256C Low signal of the sensor / switch of the engine speed selector at idle

P256D High signal of the sensor / switch of the engine speed selector at idle

U0001 High speed CAN data bus

U0073 Bus A data transmission control module off

U0100 Lost communication with ECM / PCM "A"

U0121 Lost Communication With Anti-lock Braking System (ABS) Control Module

U0401 Invalid data received from ECM / PCM "A"

U3FFF DTC SAE does not exist - vendor specific data required

JCB DIAGNOSTIC TROUBLE CODES - FLASH CODES

P0087 (flashing code 227) the pressure in the fuel rail is too low (for a pump without pressure) The main symptoms

• Strong vibration from the engine.

• Unstable idle

• Output power drop

Exhaust smoke

• There may be too much smoke output

P0088 (flashing code 118) the pressure in the fuel rail is too high

The main symptoms

• Severe engine vibration

• idling is unstable

• Output power drop

• refusal to pump out the gas engine

Exhaust smoke

• The output may be too large

P0089 (flashing code 151) the fuel rail pressure regulator is faulty

The main symptoms

• Severe engine vibration

• idling is unstable

• Output power drop

Exhaust smoke

• The output may be too large

P0090 (flashing code 247) SCV open or shorted fuel pressure regulator

The main symptoms

• Depending on open / short situations, there may be engine stop and / or start

Exhaust smoke

• Smoke output is too high

P0107 (flashing code 71) Atmospheric pressure sensor input low (open or shorted to ground)

The main symptoms

Due to a fallback equivalent altitude of 2000 m (6562 ft)

• Exhaust smoke at high altitude.

• insufficient power at low altitude

P0108 (flashing code 71) Atmospheric pressure sensor input high (+ 5V shorted)

The main symptoms

Due to a fallback equivalent altitude of 2000 m (6562 ft)

• High exhaust smoke

• lack of power at low altitude

P0112 (flashing code 22) intake air temperature sensor malfunction (low voltage error, short to ground, short circuit)

The main symptoms

• White smoke may be emitted during cold start.

P0113 (flashing code 22) intake air temperature sensor malfunction (high voltage supply circuit malfunction)

The main symptoms

• White smoke may be emitted during cold start.

P0117 (flashing code 23) engine coolant temperature sensor malfunction (low voltage error, short to ground, short circuit)

The main symptoms

• At normal temperatures: smoke may be generated,

• At low ambient temperatures at idle speed: there may be an unstable idle speed, difficult to start the engine

P0118 (blinking code 23) The engine coolant temperature sensor gives out overestimated data (shorted to positive or short circuit)

The main symptoms

• At normal temperatures: smoke may be generated,

• At low air temperatures during standstill: there may be an unstable idle,

P0182 (flashing code 211) Fuel temperature sensor malfunction (low voltage faults, shorted to ground)

The main symptoms

Impact on performance.

P0183 (blink code 211) Fuel temperature sensor malfunction (high voltage failure, power circuit open or

short circuit)

P0192 (flashing code 245) fuel pressure sensor (low voltage or short circuit)

The main symptoms

• Possibly stopping the engine

• decrease in output power

P0193 (error code 245) high fuel pressure sensor signal (open or short to positive)

The main symptoms

• the engine may stop

• Output power drop

P0201 (flashing code 271) open circuit in the control circuit of the cylinder 1 injector

The main symptoms