DIAGNOSTIC TROUBLE CODE DEFINITIONS
If any DTCs not listed here are displayed by a scan tool, scan tool data may be faulty. Notify scan tool manufacturer of any DTCs displayed that are not included in the following.
| DTC/Type | Component/System | Most Likely Cause |
|---|---|---|
| P0101/B | MAF Sensor Circuit Range/ Performance Problem | MAF Sensor |
| P0102/A | MAF Sensor Circuit Low Frequency | Open/Short, MAF Sensor Or PCM |
| P0103/A | MAF Sensor Circuit High Frequency | Open/Short, MAF Sensor Or PCM |
| P0106/B | MAP Sensor Circuit Range/ Performance Problem | MAP Sensor |
| P0107/A | MAP Sensor Circuit Low Frequency | Open/Short, MAP Sensor Or PCM |
| P0108/A | MAP Sensor Circuit High Frequency | Open, MAP Sensor Or PCM |
| P0112/A | IAT Sensor Circuit Low Frequency | Short, IAT Sensor Or PCM |
| P0113/A | IAT Sensor Circuit High Frequency | Open, IAT Sensor Or PCM |
| P0117/A | ECT Sensor Circuit Low Frequency | Short, ECT Sensor Or PCM |
| P0118/A | ECT Sensor Circuit High Frequency | Open, ECT Sensor Or PCM |
| P0121/A | TP Sensor Circuit Range/ Performance Problem | TP Sensor Or PCM |
| P0122/A | TP Sensor Circuit Low Frequency | Open/Short, TP Sensor Or PCM |
| P0123/A | TP Sensor Circuit High Frequency | Open Circuit, TP Sensor Or PCM |
| P0125/B | ECT Sensor Circuit Excessive Warm-Up Time To Closed Loop | Cooling System, ECT Or PCM |
| P0131/A | Bank 1 Primary HO2S Circuit Low Voltage | Short, HO2S Sensor, Fuel Supply Or PCM |
| P0132/A | Bank 1 Primary HO2S Circuit High Voltage | Open, HO2S Sensor Or PCM |
| P0133/B | Bank 1 Primary HO2S Slow Response | Open/Short, HO2S Sensor Or PCM |
| P0134/A | Bank 1 Primary HO2S Insufficient Activity | Poor Connections, HO2S Sensor Or PCM |
| P0135/B | Bank 1 Primary HO2S Heater Circuit Malfunction | Open/Short Or HO2S |
| P0137/A | Bank 1 Secondary HO2S Circuit Low Voltage | Short, HO2S Or PCM |
| P0138/A | Bank 1 Secondary HO2S Circuit High Voltage | Open/Short, HO2S Or PCM |
| P0140/A | Bank 1 Secondary HO2S Circuit Insufficient Activity | Open, HO2S Or PCM |
| P0141/B | Bank 1 Secondary HO2S Circuit Malfunction | Open Or HO2S |
| P0143/A | Bank 1 Tertiary HO2S Low Voltage (M/T Only) | Short Or PCM |
| P0144/A | Bank 1 Tertiary HO2S High Voltage (M/T Only) | Open/Short, HO2S Or PCM |
| P0146/A | Bank 1 Tertiary HO2S Insufficient Activity (M/T Only) | Short, HO2S Or PCM |
| P0147/B | Bank 1 Tertiary HO2S Heater Circuit (M/T Only) | Open/Short Or HO2S |
| P0151/A | Bank 2 Secondary HO2S Circuit Low Voltage | Short Or PCM |
| P0152/A | Bank 2 Secondary HO2S Circuit High Voltage | Short, HO2S Or PCM |
| P0153/B | Bank 2 Secondary HO2S Circuit Slow Response | Open/Short, HO2S Contamination Or PCM |
| P0154/A | Bank 2 Secondary HO2S Insufficient Activity | HO2S Or PCM |
| P0155/B | Bank 2 Secondary HO2S Heater Circuit | Short Or HO2S |
| P0157/A | Bank 2 Secondary HO2S Circuit Low Voltage (A/T Only) | Short Or PCM |
| P0158/A | Bank 2 Secondary HO2S Circuit High Voltage (A/T Only) | Short, HO2S Or PCM |
| P0160/A | Bank 2 Secondary HO2S Circuit Insufficient Activity (A/T Only) | Open, HO2S Or PCM |
| P0161/B | Bank 2 Secondary HO2S Heater Circuit Malfunction (A/T Only) | Open Or HO2S |
| P0171/B | Bank 1 System Too Lean | Fuel Supply/Contam- ination, Primary HO2S |
| P0171/B | Bank 1 System Too Lean | MAF, Leaking Exhaust Or Valve Clearance |
| P0172/B | Bank 1 System Too Rich | Fuel Supply, Primary HO2S, MAF Sensor, Fuel, Contamination Or Valve Clearance |
| P0174/B | Bank 2 System Too Lean | Air Intake System, MAF Sensor, Fuel Supply |
| P0174/B | Bank 2 System Too Lean | Or Exhaust System |
| P0175/B | Bank 2 System Too Rich | Air Intake System, MAF Sensor, Fuel Supply Or TP Sensor |
| P0200/A | Injector Control Circuit | Open/Short Or Faulty Injector |
| P0201/A | Injector No. 1 Circuit Malfunction | Open/Short Or PCM |
| P0202/A | Injector No. 2 Circuit Malfunction | Open/Short Or PCM |
| P0203/A | Injector No. 3 Circuit Malfunction | Open/Short Or PCM |
| P0204/A | Injector No. 4 Circuit Malfunction | Open/Short Or PCM |
| P0205/A | Injector No. 5 Circuit Malfunction | Open/Short Or PCM |
| P0206/A | Injector No. 6 Circuit Malfunction | Open/Short Or PCM |
| P0218/D | Transmission High Temp. Condition (A/T Only) | Miscellaneous |
| P0300/B | Random Misfire Detected | Ignition System, Fuel Supply, MAF Sensor, EGR System, IAC Valve Or Contaminated Fuel |
| P0301/B | Cylinder No. 1 Misfire Detected | Miscellaneous |
| P0302/B | Cylinder No. 2 Misfire Detected | Miscellaneous |
| P0303/B | Cylinder No. 3 Misfire Detected | Miscellaneous |
| P0304/B | Cylinder No. 4 Misfire Detected | Miscellaneous |
| P0305/B | Cylinder No. 5 Misfire Detected | Miscellaneous |
| P0306/B | Cylinder No. 6 Misfire Detected | Miscellaneous |
| P0325B | Knock Sensor (KS) Circuit | PCM |
| P0327/B | Malfunction KS Circuit | Open/Short, KS Or PCM |
| P0335/B | Crankshaft Position (CKP) Sensor Circuit Malfunction | CKP Sensor, Circuit Or PCM |
| P0336/B | CKP Sensor Range/Performance Or Reference Signal | CKP Sensor, Valve Timing, Timing Belt Skipped Teeth, Or PCM |
| P0337/B | CKP Circuit Low Frequency | Open/Short, CKP Sensor Or PCM |
| P0338/A | CKP Sensor High Frequency | CKP Sensor Circuit Or VCM |
| P0339/A | CKP Sensor Circuit Intermittent | CKP Sensor, CKP Sensor Circuit Or VCM |
| P0340/A | CMP Sensor Circuit | CMP Sensor, CMP Sensor Circuit Or VCM |
| P0341/A | CMP Circuit Performance | Open/Short, CMP Sensor, Faulty Or |
| P0341 | CMP Circuit Performance | Missing CMP Magnet OR PCM |
| P0342/A | CMP Sensor Low Frequency | CMP Sensor/Magnet Or PCM |
| P0351/A | Ignition Coil 1 Circuit | Ignition Control Module (ICM) Open/Short Or PCM |
| P0352/A | Ignition Coil 2 Circuit | Miscellaneous |
| P0353/A | Ignition Coil 3 Circuit | Miscellaneous |
| P0354/A | Ignition Coil 3 Circuit | Miscellaneous |
| P0355/A | Ignition Coil 3 Circuit | Miscellaneous |
| P0356/A | Ignition Coil 3 Circuit | Miscellaneous |
| P0401/A | Insufficient EGR Flow Detected | MAP Sensor, EGR Valve Or Line |
| P0402/B | EGR Pintle Crank Error | Open, Poor Connections, Open Or EGR Valve |
| P0404/B | EGR Valve Pintle Position Open | EGR Valve, EGR Valve Circuit Or PCM |
| P0405/A | EGR Valve Sensor Signal Low | Short, EGR Valve Or PCM |
| P0406/A | EGR Sensor Signal High | Open/Short, EGR Valve Or PCM |
| P0420/A | Bank 1 Catalyst System Efficiency Below Threshold | Catalytic Converter Or Secondary HO2S |
| P0430/A | Bank 2 Catalyst System Efficiency Below Threshold (A/T Only) | Catalytic Converter Or Secondary HO2S |
| P0440/A | EVAP System | EVAP Canister, Canister Purge Valve, EVAP Vent Solenoid Or Hoses |
| P0441/B | Evaporative Emission Control System, Incorrect Purge Flow | EVAP Canister, Vacuum Switch, Purge Solenoid Or PCM |
| P0442/A | EVAP Small Leak Detected | Vent Solenoid, Fuel Cap Or Lines |
| P0443/A | Evaporative Emission Control System Purge Valve Malfuntion | Open/Short, Canister Purge Control |
| P0443/A | Evaporative Emission Control System Purge Valve Malfuntion | Solenoid Or PCM |
| P0446/A | EVAP System Canister Vent Blocked (Except 4.3L) | Short, EVAP Canister Vent Solenoid Or EVAP Canister |
| P0446/A | EVAP Vent Valve Performance (4.3L) | Short, Poor Connections, EVAP Canister Or EVAP Canister Vent Solenoid |
| P0452/D | Fuel Tank Pressure Sensor Signal Low | Open Or PCM |
| P0453/D | Fuel Tank Pressure Sensor Signal High | Open/Short, Pressure Sensor Or PCM |
| P0460/D | EVAP Fuel Level Sensor Circuit | Miscellaneous |
| P0461/D | Fuel Level Sensor Circuit Performance | Fuel Level Sensor/ Circuit Or PCM/VCM |
| P0462/D | Fuel Level Sensor Circuit Low Voltage | Open/Short, Fuel Level Sensor Or PCM/VCM |
| P0463/D | Fuel Level Sensor Circuit High Voltage | Fuel Level Sensor/ Circuit Or PCM/VCM |
| P0480/D | Cooling Fan No. 1 Control Circuit Malfunction | Open/Short, Low Fan Relay Or PCM |
| P0481/D | Cooling Fan No. 2 Control Circuit Malfunction | Open/Short, High Fan Relay Or PCM |
| P0500/A | Vehicle Speed Sensor (VSS) Circuit | VSS, Circuit Or PCM |
| P0501/A | Vehicle Speed Sensor (VSS) Circuit Range/Performance | VSS, Circuit Or PCM |
| P0502/A | VSS Circuit Low Frequency | Open/Short, VSS Or PCM |
| P0506/B | Idle Control System Low RPM | Open/Short, IAC Valve Or PCM |
| P0507/B | Idle Control System High RPM | IAC Valve Or PCM |
| P0530/D | A/C Refrigerant Pressure Sensor Circuit | Open, A/C Refrigerant Pressure Sensor Or PCM |
| P0532/D | A/C Refrigerant Pressure Sensor Circuit Low Input | Open/Short, A/C Refrigerant |
| P0532/D | A/C Refrigerant Pressure Sensor Circuit Low Input | Pressure Sensor Or PCM |
| P0533/D | A/C Refrigerant Pressure Sensor Circuit High Input | Open/Short, A/C Refrigerant |
| P0533/D | A/C Refrigerant Pressure Sensor Circuit High Input | Pressure Sensor Or PCM |
| P0560/D | System Voltage Malfunction (A/T Only) | Miscellaneous |
| P0562/D | System Voltage Low | Open Or PCM |
| P0563/D | System Voltage High | Generator Or PCM |
| P0601/A | Powertrain Control module (PCM) Memory Check Sum Error | PCM |
| P0602/D | PCM Not Programmed | PCM |
| P0604/D | VCM Random Access Memory (RAM) | VCM |
| P0605/D | VCM Read Only Memory (ROM) | VCM |
| P0704/B (1) | Clutch Switch Circuit | Clutch Switch/Circuit Or VCM |
| P0705/D (1) | Transmission Range Switch Illegal Position | Miscellaneous |
| P0706/D (1) | Transmission Range Sensor Performance | Miscellaneous |
| P0712/D (1) | Transmission Fluid Temperature Low Voltage | Miscellaneous |
| P0713/D (1) | Transmission Fluid Temperature High Voltage | Miscellaneous |
| P0719/D (1) | Brake Switch Circuit Low | Miscellaneous |
| P0722/A (1) | Output Speed Sensor Circuit No Signal | Miscellaneous |
| P0723/A (1) | Output speed Sensor Circuit Intermittent Signal | Miscellaneous |
| P0724/D (1) | Brake Switch Circuit High | Miscellaneous |
| P0730/C (1) | Incorrect Gear Ratio. Stuck In 1st Or 4th Gear (A/T) | Faulty Shift Control System |
| P0742/A (1) | Torque Converter Clutch Circuit Stuck On | Miscellaneous |
| P0748/C (1) | Transmission Pressure Control Solenoid Electrical Circuit Fault | Miscellaneous |
| P0751/B (1) | Transmission Shift Solenoid "A" Performance Or Stuck Off (A/T) | Miscellaneous |
| P0753/A (1) | Transmission Shift Solenoid "A" Electrical Circuit Fault | Open/Short Or Faulty Solenoid |
| P0756/B (1) | Transmission Shift Solenoid "B" Performance Stuck Off (A/T) | Miscellaneous |
| P0758/A (1) | Transmission Shift Solenoid "B" Electrical Circuit Fault | Open/Short Or Faulty Solenoid |
| P1106/D | Manifold Absolute Pressure (MAP) Circuit Intermittent High Voltage | Open/Short In Circuit |
| P1107/D | MAP/Barometric Pressure Circuit Low Voltage | Intermittent Open/ Short Or PCM |
| P1111/D | Intake Air Temperature (IAT) Circuit Intermittent High Voltage | Poor Ground Or Open Circuit |
| P1112/D | IAT Circuit Intermittent Low Voltage | Short In Circuit |
| P1114/D | Engine Coolant Temperature (ECT) Circuit Intermittent Low Voltage | Intermittent Short |
| P1115/D | ECT Circuit Intermittent High Voltage | Poor PCM Ground Or Open |
| P1121/D | Throttle Position (TP) Circuit Intermittent High Voltage | Open/Short Or Poor Ground In Circuit |
| P1122/D | TP Circuit Intermittent Low Voltage | Open/Short Or Poor Ground In Circuit |
| P1133/B | Bank 1 Primary HO2S Circuit Insufficient Switching | Exhaust Leak, Short In Circuit, HO2S Or PCM |
| P1134/B | Bank 1 Primary HO2S Circuit Transition Time Ratio | Exhaust Leak, Open/ Short In Circuit |
| P1134 | Bank 1 Primary HO2S Circuit Transition Time Ratio | HO2S Or PCM |
| P1153/B | Bank 2 Primary HO2S Circuit Insufficient Switching | Exhaust Leak, Short In Circuit, HO2S Or PCM |
| P1154/B | Bank 2 Primary HO2S Circuit Transition Time Ratio | Exhaust Leak, Open/ Short In Circuit, HO2S Or PCM |
| P1171/A | Fuel System Lean During Acceleration | Faulty Or Incorrect Fuel Pump, Plugged Strainer |
| P1171/A | Fuel System Lean During Acceleration | Incorrect Fuel Or Hot Fuel |
| P1336 | CKP System Variation Not Learned | Miscellaneous |
| P1345 | CMP/CKP Sensor Correlation | Mechinical Problem |
| P1351 | Ignition Control Circuit High Voltage | Ignition Module/ Circuit Or VCM |
| P1361 | Ignition Control Circuit Low Voltage | Ignition Module/ Circuit Or VCM |
| P1380/A | ABS DTC Detected Rough Road Data Unusable | PCM |
| P1381/A | (Except Hombre) ABS Rough Road Class 2 Serial Link Error | Open Circuit Or PCM |
| P1381/A | (Hombre) CPS Intermittent Interruption | CYP Sensor |
| P1404/A | EGR Valve Closed Pintle Position | EGR Valve/Circuit Or PCM |
| P1441/B | Evaporative Emission (EVAP) System Flow During Non-Purge | Short, PCM, EVAP Purge Solenoid Or |
| P1441 | Evaporative Emission (EVAP) System Flow During Non-Purge | EVAP Vacuum Switch |
| P1442/B | EVAP System Vacuum Switch Circuit | Open/Short, PCM Or EVAP Vacuum Switch |
| P1508/B | Idle Control System Low RPM | IAC Valve Circuit Or PCM |
| P1509/B | Idle Control System High RPM | Vacuum Leaks, IAC Circuit Or PCM |
| P1546/D | A/C Clutch Output Circuit Malfunction | Open/Short, A/C Clutch Relay Or PCM |
| P1618/A | Serial Peripheral Interface PCM Interprocessor Communication Error | PCM |
| P1621 | PCM Memory Performance | PCM |
| P1625/A | Unexpected PCM Reset | Open/Short Or PCM |
| P1626/C | Loss Of Serial Communication With VTD System | Open Circuit(s) Or Poor Connections |
| P1627 | Driver "1" Input High Voltage | Open/Short Or PCM |
| P1631 | Theft Deterrent Password Incorrect | Miscellaneous |
| P1635/A | 5 Volt Reference Voltage Circuit Malfunction | Open/Short Or PCM2 |
| P1640/D | ODM "A" Fault | Open in Ignition Circuit Or PCM |
| P1650/D | ODM "A" Fault | Open in Ignition Circuit Or PCM |
| P1790/A (1) | TRANS ROM Checksum Error | Miscellaneous |
| P1792/A (1) | TRANS EEPROM Checksum Error | Miscellaneous |
| P1835/D (1) | TRANS Kick Down Switch Malfunction | Miscellaneous |
| P1850/A (1) | Brake Band Apply Solenoid Malfunction | Miscellaneous |
| P1860/A (1) | TCC PWM Solenoid Circuit Fault | Miscellaneous |
| P1870/A (1) | Transmission Component Slipping | Miscellaneous |
| (1) Transmission fault. See appropriate DIAGNOSIS article in AUTOMATIC TRANSMISSIONS. |
| (1) | Transmission fault. See appropriate DIAGNOSIS article in AUTOMATIC TRANSMISSIONS. |
DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION