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Diagnostic Trouble Code Definitions

DIAGNOSTIC TROUBLE CODE INDEX

DTC (1) Description (2) Code Type
BXXXX (3) Body Control Systems Malfunction N/A
CXXXX (3) Chassis Control System Malfunction N/A
P0101  Mass Air Flow Sensor Performance B
P0102  MAF Sensor Circuit - Low Frequency B
P0103  MAF Sensor Circuit - High Frequency B
P0106  MAP System Performance B
P0107  MAP Sensor Circuit - Low Voltage B
P0108  MAP Sensor Circuit - High Voltage B
P0112  IAT Sensor Circuit - Low Voltage B
P0113  IAT Sensor Circuit - High Voltage B
P0116  ECT Sensor Performance B
P0117  ECT Sensor Circuit - Low Voltage B
P0118  ECT Sensor Circuit - High Voltage B
P0121  TP Sensor Performance B
P0122  TP Sensor Circuit - Low Voltage B
P0123  TP Sensor Circuit - High Voltage B
P0125  Excess Time To Enter Closed Loop Fuel Control B
P0128  ECT Less Than Thermostat Regulating Temperature B
P0131  HO2S Circuit - Low Voltage - Bank 1, Sensor 1 B
P0132  HO2S Circuit - High Voltage - Bank 1, Sensor 1 B
P0133  HO2S Circuit - Slow Response - Bank 1, Sensor 1 (Astro & Safari) B
P0133  HO2S Circuit - Slow Response - Bank 1, Sensor 1 (Blazer, Jimmy Canadian, Sonoma & S10 Pickup) B
P0134  HO2S Circuit - Insufficient Activity - Bank 1, Sensor 1 (Astro & Safari) B
P0134  HO2S Circuit - Insufficient Activity - Bank 1, Sensor 1 (Blazer, Jimmy Canadian, Sonoma & S10 Pickup) B
P0135  HO2S Heater Circuit - Bank 1, Sensors 1 (Astro & Safari) B
P0135  HO2S Heater Circuit - Bank 1, Sensors 1 (Blazer, Jimmy Canadian, Sonoma & S10 Pickup) B
P0137  HO2S Circuit - Low Voltage - Bank 1, Sensor 2 B
P0138  HO2S Circuit - High Voltage - Bank 1, Sensor 2 B
P0140  HO2S Circuit - Insufficient Activity - Bank 1, Sensor 2 B
P0141  HO2S Heater Circuit - Bank 1, Sensor 2 (Astro & Safari) B
P0141  HO2S Heater Circuit - Bank 1, Sensor 2 (Blazer, Jimmy Canadian, Sonoma & S10 Pickup) B
P0151  HO2S Circuit - Low Voltage - Bank 2, Sensor 1 B
P0152  HO2S Circuit - High Voltage - Bank 2, Sensor 1 (Blazer, Jimmy Canadian, Sonoma & S10 Pickup) B
P0153  HO2S Circuit - Slow Response - Bank 2, Sensor 1 (Astro & Safari) B
P0153  HO2S Circuit - Slow Response - Bank 2, Sensor 1 (Blazer, Jimmy Canadian, Sonoma & S10 Pickup) B
P0154  HO2S Circuit - Insufficient Activity - Bank 2, Sensor 1 (Astro & Safari) B
P0154  HO2S Circuit - Insufficient Activity - Bank 2, Sensor 1 (Blazer, Jimmy Canadian, Sonoma & S10 Pickup) B
P0155  HO2S Heater Circuit - Bank 2, Sensor 1 (Astro & Safari) B
P0155  HO2S Heater Circuit - Bank 2, Sensor 1 (Blazer, Jimmy Canadian, Sonoma & S10 Pickup) B
P0171  Fuel Trim System Lean - Bank 1 B
P0172  Fuel Trim System Rich - Bank 1 B
P0174  Fuel Trim System Lean - Bank 2 B
P0175  Fuel Trim System Rich - Bank 2 B
P0200  Fuel Injector Control Circuit B
P0218 (4) Transmission Fluid Overtemperature C
P0230  Fuel Pump Control Relay Circuit B
P0300  Engine Misfire Detected B
P0325  Knock Sensor Module Circuit B
P0327  Knock Sensor Circuit - Low Voltage B
P0335  Crankshaft Position Sensor Circuit B
P0336  Crankshaft Position Sensor Circuit Performance B
P0341  Camshaft Position Sensor Circuit Performance B
P0351  Ignition Control Circuit B
P0420  TWC System - Low Efficiency - Bank 1 A
P0430  TWC System - Low Efficiency - Bank 2 A
P0440  EVAP System - Large Leak A
P0442  EVAP System - Small Leak A
P0443  EVAP Purge Solenoid Control Circuit B
P0446  EVAP Vent Valve Performance A
P0449  EVAP Vent Valve Performance B
P0452  Fuel Tank Pressure Sensor - Low Voltage B
P0453  Fuel Tank Pressure Sensor - High Voltage B
P0461 (5) Fuel Level Sensor Circuit Performance C
P0462 (5) Fuel Level Sensor Circuit - Low Voltage C
P0463 (5) Fuel Level Sensor Circuit - High Voltage C
P0500  Vehicle Speed Sensor (M/T) B
P0502  Vehicle Speed Sensor Low Output B
P0503  Vehicle Speed Sensor Erratic B
P0506  Idle Control System - Low RPM B
P0507  Idle Control System - RPM High B
P0562 (6) Low System Voltage C
P0563 (6) High System Voltage C
P0601  PCM Memory (Astro & Safari) A
P0601  PCM Memory (Blazer, Jimmy Canadian, Sonoma & S10 Pickup) A
P0602  PCM Not Programmed (Astro & Safari) A
P0602  PCM Not Programmed (Blazer, Jimmy Canadian, Sonoma & S10 Pickup) A
P0604  PCM Random Access Memory Performance (Astro & Safari) A
P0604  PCM Random Access Memory Performance (Blazer, Jimmy Canadian, Sonoma & S10 Pickup) A
P0606  PCM Memory (Astro & Safari) A
P0606  PCM Memory (Blazer, Jimmy Canadian, Sonoma & S10 Pickup) A
P0607  PCM Memory (Astro & Safari) A
P0607  PCM Memory (Blazer, Jimmy Canadian, Sonoma & S10 Pickup) A
P0621 (6) Generator "L" Terminal Circuit C
P0622 (6) Generator Field Circuit C
P0650  MIL Control Circuit B
P0704  Clutch Pedal Switch B
P0706  Transmission Range Switch C
P0711 (4) TFT Sensor Circuit - Range/Performance C
P0712 (4) TFT Sensor Circuit - Low Input C
P0713 (4) TFT Sensor Circuit - High Input C
P0719  Brake Switch Circuit - Low Input C
P0724  Brake Switch Circuit - High Input C
P0740 (4) TCC Enable Solenoid Circuit - Electrical Malfunction B
P0741 (4) TCC System - Stuck Off B
P0742 (4) TCC System - Stuck On B
P0748 (4) PC Solenoid Circuit - Electrical Malfunction B
P0751 (4) 1-2 Shift Solenoid Valve Performance B
P0752 (4) 1-2 Shift Solenoid Valve Performance - No 2nd Or 3rd Gear B
P0753 (4) 1-2 Shift Solenoid Circuit - Electrical Malfunction B
P0756 (4) 2-3 Shift Solenoid Valve Performance A
P0757 (4) 2-3 Shift Solenoid Valve Performance - No 3rd Or 4th Gear A
P0758 (4) 2-3 Shift Solenoid Circuit - Electrical Malfunction A
P0785 (4) 3-2 Shift Solenoid Circuit - Electrical Malfunction B
P1111  IAT Sensor Circuit - Intermittent High Voltage C
P1112  IAT Sensor Circuit - Intermittent Low Voltage C
P1114  ECT Sensor Circuit - Intermittent Low Voltage C
P1115  ECT Sensor Circuit - Intermittent High Voltage C
P1121  TP Sensor Circuit - Intermittent High Voltage C
P1122  TP Sensor Circuit - Intermittent Low Voltage C
P1133  HO2S Circuit - Insufficient Switching - Bank 1, Sensor 1 (Astro & Safari) B
P1133  HO2S Circuit - Insufficient Switching - Bank 1, Sensor 1 (Blazer, Jimmy Canadian, Sonoma & S10 Pickup) B
P1134  HO2S Transition Time Ratio - Bank 1, Sensor 1 (Astro & Safari) B
P1134  HO2S Transition Time Ratio - Bank 1, Sensor 1 (Blazer, Jimmy Canadian, Sonoma & S10 Pickup) B
P1153  HO2S Circuit - Insufficient Switching - Bank 2, Sensor 1 (Astro & Safari) B
P1153  HO2S Circuit - Insufficient Switching - Bank 2, Sensor 1 (Blazer, Jimmy Canadian, Sonoma & S10 Pickup) B
P1154  HO2S Circuit - Insufficient Switching - Bank 2, Sensor 1 (Astro & Safari) B
P1154  HO2S Transition Time Ratio - Bank 1 & 2, Sensor 1 (Blazer, Jimmy Canadian, Sonoma & S10 Pickup) B
P1258  Engine Overtemperature A
P1336  Crankshaft System Variation Not Learned A
P1345  Crankshaft/Camshaft Sensor Correlation A
P1380  EBCM DTC Detected Rough Road Data Unstable C
P1381  Misfire Detected - No EBCM/PCM Serial Data C
P1441  EVAP System Flow During Non-Purge B
P1600  PCM Memory Performance (Astro & Safari) A
P1600  PCM Memory Performance (Blazer, Jimmy Canadian, Sonoma & S10 Pickup) A
P1621  PCM Memory Performance (Astro & Safari) A
P1621  PCM Memory Performance (Blazer, Jimmy Canadian, Sonoma & S10 Pickup) A
P1626 (7) Theft Deterrent System Loss Of Serial Communication C
P1627  PCM Memory Performance (Astro & Safari) A
P1627  PCM Memory Performance (Blazer, Jimmy Canadian, Sonoma & S10 Pickup) A
P1630 (7) PCM Unable To Learn Passlock™ Module Password C
P1631 (7) Theft Deterrent System Password Incorrect C
P1632 (7) Fuel Disable Or Undecided Password Sent From BCM C
P1635  5-Volt Reference A Circuit B
P1637 (6) Generator Turn-On Signal Circuit Voltage Out Of Range C
P1638 (6) Pulse Width Modulated Signal Out Of Range C
P1639  5-Volt Reference B Circuit B
P1680  PCM Memory (Astro & Safari) A
P1680  PCM Memory (Blazer, Jimmy Canadian, Sonoma & S10 Pickup) A
P1681  PCM Memory (Astro & Safari) A
P1681  PCM Memory (Blazer, Jimmy Canadian, Sonoma & S10 Pickup) A
P1683  PCM Memory (Astro & Safari) A
P1683  PCM Memory (Blazer, Jimmy Canadian, Sonoma & S10 Pickup) B
P1810 (4) TFP Manual Valve Position Switch - Circuit Malfunction B
P1860 (4) TCC PWM Solenoid Circuit - Electrical Malfunction B
P1870 (4) Transmission Component Slipping B
P1875 (4) 4WD Low Switch Circuit - Electrical Malfunction B
UXXXX (3) Network Communication System Malfunction N/A
(1) DTC definitions may vary depending on vehicle and/or engine configuration.
(2) See CODE TYPES  under ON-BOARD DIAGNOSTICS.
(3) See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
(4) See appropriate DIAGNOSIS article in AUTOMATIC TRANSMISSIONS.
(5) See appropriate ANALOG INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT.
(6) See appropriate GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS.
(7) See appropriate ANTI-THEFT SYSTEMS article in ACCESSORIES & EQUIPMENT.
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