Trouble Code Identification

NOTE: Trouble codes retrieved from PCM may be either engine or transmission related. Trouble codes retrieved from TCM are only transmission related. Only engine related codes are covered in this article. For transmission related codes, see appropriate lemon-25(R) TRANSMISSION SERVICE & REPAIR manual for domestic vehicles. See DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION table to determine if code is engine or transmission related.

The DEC/electronically-controlled transmission systems codes indicate failure of a specific sensor and/or circuit. Sensor/circuit diagnosis may indicate replacement of PCM/TCM.
If PCM/TCM is replaced at any point during diagnostic testing and if condition is still not corrected after replacing PCM/TCM, the following may be the cause:
- An incorrect PCM/TCM may cause a malfunction, which may or may not set a code.
- The PCM/TCM connector may be the problem. Connector terminals may have to be removed from connector to be checked properly.
- Replacement PCM/TCM may be faulty.
- Intermittent problem. Make a careful physical inspection of affected sensor/circuit.
- A shorted solenoid, coil relay, or harness may be the cause of PCM/TCM failure. Use Short Circuit Tester (J-34636) to check for short circuits.

DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

Code

Probable Cause

P0112 ⁽¹⁾

Intake Air Temperature (IAT) Sensor Circuit Low Voltage

P0113 ⁽¹⁾

Intake Air Temperature (IAT) Sensor Circuit High Voltage

P0117 ⁽¹⁾

Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage

P0118 ⁽¹⁾

Engine Coolant Temperature (ECT) Sensor Circuit High Voltage

P0121 ⁽¹⁾

Accelerator Pedal Position (APP) Sensor 1 Circuit Performance

P0122 ⁽¹⁾

Accelerator Pedal Position (APP) Sensor 1 Circuit Low Voltage

P0123 ⁽¹⁾

Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage

P0182 ⁽¹⁾

Fuel Temperature Sensor Circuit Low Voltage

P0183 ⁽¹⁾

Fuel Temperature Sensor Circuit High Voltage

P0215 ⁽¹⁾

Engine Shutoff Solenoid Control Circuit

P0216 ⁽¹⁾

Injection Timing Control System

P0219 ⁽¹⁾

Engine Overspeed Condition

P0220 ⁽¹⁾

Accelerator Pedal Position (APP) Sensor 2 Circuit

P0221 ⁽¹⁾

Accelerator Pedal Position (APP) Sensor 2 Circuit Performance

P0222 ⁽¹⁾

Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage

P0223 ⁽¹⁾

Accelerator Pedal Position (APP) Sensor 2 Circuit High Voltage

P0225 ⁽¹⁾

Accelerator Pedal Position (APP) Sensor 3 Circuit

P0226 ⁽¹⁾

Accelerator Pedal Position (APP) Sensor 3 Circuit Performance

P0227 ⁽¹⁾

Accelerator Pedal Position (APP) Sensor 3 Circuit Low Voltage

P0228 ⁽¹⁾

Accelerator Pedal Position (APP) Sensor 3 Circuit High Voltage

P0231 ⁽¹⁾

Lift Pump Secondary Circuit Low Voltage

P0236 ⁽¹⁾

Turbocharger Boost System

P0237 ⁽¹⁾

Turbocharger Boost Sensor Circuit Low Voltage

P0238 ⁽¹⁾

Turbocharger Boost Sensor Circuit High Voltage

P0251 ⁽¹⁾

Injection Pump Cam System

P0263 ⁽¹⁾

Cylinder 8 Balance System

P0266 ⁽¹⁾

Cylinder 7 Balance System

P0269 ⁽¹⁾

Cylinder 2 Balance System

P0272 ⁽¹⁾

Cylinder 6 Balance System

P0275 ⁽¹⁾

Cylinder 5 Balance System

P0278 ⁽¹⁾

Cylinder 4 Balance System

P0281 ⁽¹⁾

Cylinder 3 Balance System

P0284 ⁽¹⁾

Cylinder 1 Balance System

P0335 ⁽¹⁾

Crankshaft Position (CKP) Sensor Circuit Performance

P0370 ⁽¹⁾

Timing Reference High Resolution

P0380 ⁽¹⁾

Glow Plug Circuit Performance

P0501 ⁽¹⁾

Vehicle Speed Sensor Circuit

P0560 ⁽²⁾

System Voltage Malfunction

P0567 ⁽¹⁾

Cruise Resume Circuit

P0568 ⁽¹⁾

Cruise Set Circuit

P0571 ⁽¹⁾

Cruise Brake Switch Circuit

P0601 ⁽¹⁾

PCM Memory

P0602 ⁽¹⁾

PCM Not Programmed

P0606 ⁽¹⁾

PCM Internal Communication Interrupted

P0712 ⁽²⁾

TFT Sensor Circuit - Low Input

P0713 ⁽²⁾

TFT Sensor Circuit - High Input

P0716 ⁽²⁾

Input Speed Sensor Circuit - Range/Performance

P0717 ⁽²⁾

Input Speed Sensor Circuit - No Signal

P0719 ⁽²⁾

Brake Switch Circuit - Low Input

P0722 ⁽²⁾

Output Speed Sensor - Low Input

P0723 ⁽²⁾

Output Speed Sensor - Intermittent

P0724 ⁽²⁾

Brake Switch Circuit - High Input

P0741 ⁽²⁾

TCC Stuck Off

P0742 ⁽²⁾

TCC Stuck On

P0748 ⁽²⁾

PCS Circuit - Electrical

P0751 ⁽²⁾

1-2 Shift Solenoid - Performance

P0753 ⁽²⁾

1-2 Shift Solenoid - Electrical

P0756 ⁽²⁾

2-3 Shift Solenoid - Performance

P0758 ⁽²⁾

2-3 Shift Solenoid - Electrical

P1125 ⁽¹⁾

Accelerator Pedal Position (APP) System

P1214 ⁽¹⁾

Injection Timing Offset Error

P1216 ⁽¹⁾

Fuel Solenoid Response Time Too Short

P1217 ⁽¹⁾

Fuel Solenoid Response Time Too Long

P1218 ⁽¹⁾

Injection Pump Calibration Circuit

P1621 ⁽¹⁾

PCM Memory Performance

P1627 ⁽¹⁾

A/D Performance

P1635 ⁽¹⁾

PCM 5-Volt Reference Low

P1641 ⁽¹⁾

Malfunction Indicator Light (MIL) Control Circuit

P1654 ⁽¹⁾

Service Throttle Soon Control Circuit

P1656 ⁽¹⁾

Wastegate Solenoid Control Circuit

P1810 ⁽²⁾

PSA Circuit Malfunction

P1812 ⁽²⁾

Transmission Fluid Overtemperature

P1860 ⁽²⁾

TCC PWM Solenoid Circuit - Electrical

P1870 ⁽²⁾

Transmission Component Slipping

P1871 ⁽²⁾

Undefined Gear Ratio

21/22 ⁽³⁾

Throttle Position (TP) Sensor Circuit High/Low

24 ⁽³⁾

Vehicle Speed Sensor Circuit Low (Trans Output Speed Signal)

28 ⁽³⁾

Trans. Range Pressure Switch Circuit Fault

37/38 ⁽³⁾

TCC Brake Switch Stuck On/Off

39 ⁽³⁾

TCC Stuck Off

51 ⁽³⁾

PROM Error

52/53 ⁽³⁾

System Voltage High Long

58 ⁽³⁾

Trans. Fluid Temp. Sensor Circuit Low (High Temperature Indicated)

59 ⁽³⁾

Trans. Fluid Temp. Sensor Circuit High (Low Temperature Indicated)

63/64 ⁽³⁾

BARO Sensor Circuit High/Low

68 ⁽³⁾

Trans. Component Slipping

69 ⁽³⁾

TCC Stuck On

72 ⁽³⁾

Vehicle Speed Sensor Circuit Loss (Trans. Output Speed Signal)

73 ⁽³⁾

Pressure Control Solenoid Circuit (Current Error)

74 ⁽³⁾

Trans. Input Speed Sensor Circuit

75 ⁽³⁾

System Voltage Low

79 ⁽³⁾

Transmission Fluid Overtemp

81 ⁽³⁾

2-3 Shift Solenoid Circuit Fault

82 ⁽³⁾

1-2 Shift Solenoid Circuit Fault

83 ⁽³⁾

TCC PWM Solenoid Circuit Fault

85 ⁽³⁾

Undefined Ratio Error

86 ⁽³⁾

Low Ratio Error

87 ⁽³⁾

High Ratio Error

⁽¹⁾	Code is engine related.

⁽²⁾	Code is transmission related (turbo models). For transmission related codes, see appropriate ELECTRONIC CONTROLS article in AUTOMATIC TRANSMISSIONS.

⁽³⁾	Code is transmission related (non-turbo models). For transmission related codes, see appropriate ELECTRONIC CONTROLS article in AUTOMATIC TRANSMISSIONS.