DIAGNOSTIC TROUBLE CODE DEFINITIONS
If any DTCs not listed 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 DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION table.
| 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/Contamination, Primary HO2S, 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 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) | (1) 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 | |
| P0325/B | Knock Sensor (KS) Circuit Malfunction | PCM | |
| P0327/B | 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 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 4 Circuit | Miscellaneous | |
| P0355/A | Ignition Coil 5 Circuit | Miscellaneous | |
| P0356/A | Ignition Coil 6 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 | |
| P0442/A | EVAP Small Leak Detected | Vent Solenoid, Fuel Cap Or Lines | |
| P0443/A | Evaporative Emission Control System Purge Valve Malfunction | Open/Short, Canister Purge Control Solenoid Or PCM | |
| P0446/A | |||
| Except 4.3L | EVAP System Canister Vent Blocked | Short, EVAP Canister Vent Solenoid Or EVAP Canister | |
| 4.3L | EVAP Vent Valve Performance | Short, Poor Connections, EVAP Canister Or EVAP Canister Vent Solenoid | |
| P0449/A | EVAP Vent Valve/Solenoid Circuit Malfunction | Open/Short, 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 Pressure Sensor Or PCM | |
| P0533/D | A/C Refrigerant Pressure Sensor Circuit High Input | Open/Short, A/C Refrigerant Pressure Sensor Or PCM | |
| P0560/D | System Voltage Malfunction (A/T Only) | (1) 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 | |
| P0603/A | VCM Memory Reset | VCM | |
| P0604/D | VCM Random Access Memory (RAM) | VCM | |
| P0704/B | Clutch Switch Circuit | Clutch Switch/Circuit Or VCM | |
| P0705/D | Transmission Range Switch Illegal Position | (1) Miscellaneous | |
| P0706/D | Transmission Range Sensor Performance | (1) Miscellaneous | |
| P0712/D | Transmission Fluid Temperature Low Voltage | (1) Miscellaneous | |
| P0713/D | Transmission Fluid Temperature High Voltage | (1) Miscellaneous | |
| P0719/D | Brake Switch Circuit Low | (1) Miscellaneous | |
| P0722/A | Output Speed Sensor Circuit No Signal | (1) Miscellaneous | |
| P0723/A | Output speed Sensor Circuit Intermittent Signal | (1) Miscellaneous | |
| P0724/D | Brake Switch Circuit High | (1) Miscellaneous | |
| P0730/C | Incorrect Gear Ratio. Stuck in 1st Or 4th Gear (A/T) | (1) Faulty Shift Control System | |
| P0742/A | Torque Converter Clutch Circuit Stuck On | (1) Miscellaneous | |
| P0748/C | Transmission Pressure Control Solenoid Electrical Circuit Fault | (1) Miscellaneous | |
| P0751/B | Transmission Shift Solenoid "A" Performance Or Stuck Off (A/T) | (1) Miscellaneous | |
| P0753/A | Transmission Shift Solenoid "A" - Electrical Circuit Fault | (1) Open/Short Or Faulty Solenoid | |
| P0756/B | Transmission Shift Solenoid "B" Performance Stuck Off (A/T) | (1) Miscellaneous | |
| P0758/A | Transmission Shift Solenoid "B" - Electrical Circuit Fault | (1) 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, 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, Incorrect Fuel Or Hot Fuel | |
| P1336 | CKP System Variation Not Learned | Miscellaneous | |
| P1345 | CMP/CKP Sensor Correlation | Mechanical 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 | |
| Hombre | Misfire Detected No EBCM/VCM Serial Data | EBCM | |
| 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 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 | |
| P1632 | Vehicle Theft Deterrent (VTD) System Fuel Disabled | Miscellaneous | |
| P1640/D | ODM "A" Fault | Open in Ignition Circuit Or PCM | |
| P1650/D | ODM "A" Fault | Open in Ignition Circuit Or PCM | |
| U1000 | Class Communication ID Not Learned | Open/Short Circuit | |
| U1026 | Loss Of ATCM Communication | Open/Short Circuit | |
| U1041 | Loss Of EBCM Communication | Open/Short Circuit | |
| U1064 | Loss Of BCM &/Or VTD Communication | Open/Short Circuit | |
| (1) For diagnostics, see appropriate ELECTRONIC CONTROLS article in AUTOMATIC TRANSMISSIONS. | |||
| (1) | For diagnostics, see appropriate ELECTRONIC CONTROLS article in AUTOMATIC TRANSMISSIONS. |
DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION