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Diagnostic Trouble Code Definitions

WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Sierra, 2002 GMC Savana Special, 2002 GMC Savana Camper Special, and 2002 GMC Savana. However, it is still accessible from the selected car via links, so may be relevant.
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
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 B
P0134  HO2S Circuit - Insufficient Activity - Bank 1, Sensor 1 B
P0135  HO2S Heater Circuit - Bank 1, Sensor 1 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 B
P0151  HO2S Circuit - Low Voltage - Bank 2, Sensor 1 B
P0152  HO2S Circuit - High Voltage - Bank 2, Sensor 1 B
P0153  HO2S Circuit - Slow Response - Bank 2, Sensor 1 B
P0154  HO2S Circuit - Insufficient Activity - Bank 2, Sensor 1 B
P0155  HO2S Heater Circuit - Bank 2, Sensor 1 B
P0157  HO2S Circuit - Low Voltage - Bank 2, Sensor 2 B
P0158  HO2S Circuit - High Voltage - Bank 2, Sensor 2 B
P0160  HO2S Circuit - Insufficient Activity - Bank 2, Sensor 2 B
P0161  HO2S Heater Circuit - Bank 2, Sensor 2 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 (5) 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 - Sensor 1 B
P0332  Knock Sensor Circuit - Low Voltage - Sensor 2 B
P0335  Crankshaft Position Sensor Circuit B
P0336  Crankshaft Position Sensor Circuit Performance B
P0341  Camshaft Position Sensor Circuit Performance B
P0342  CMP Signal Low B
P0343  CMP Signal High B
P0351-P0358  Ignition Control Circuit B
P0401  EGR System - Insufficient Flow A
P0404  EGR Valve Open Pintle Position B
P0405  EGR Pintle Position Circuit - Low Voltage 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 (7) Fuel Level Sensor Circuit Performance C
P0462 (7) Fuel Level Sensor Circuit - Low Voltage C
P0463 (7) Fuel Level Sensor Circuit - High Voltage C
P0500  Vehicle Speed Sensor (Allison A/T) B
P0500  Vehicle Speed Sensor (M/T) B
P0502  Vehicle Speed Sensor Low Output (4L80-E A/T) (4) B
P0503  Vehicle Speed Sensor Erratic (4L80-E Transmission) (4) B
P0506 & P0507  Idle Control System - Low Or High RPM B
P0561 (5) Unrealistic Variations In Vehicle System Voltage C
P0562 (9) Low System Voltage C
P0563 (9) High System Voltage C
P0567 (10) Cruise Control Resume/Accel Switch Circuit C
P0568 (10) Cruise Control Set/Coast Switch Circuit C
P0571 (10) TCC Brake Switch Circuit C
P0601  PCM Memory A
P0602  PCM Not Programmed A
P0604  PCM Random Access Memory Performance A
P0606  PCM Memory A
P0607  PCM Memory A
P0608 (7) Vehicle Speed Circuit Fault C
P0615 (8) Starter ODM - Incorrect Voltage N/A
P0621 (9) Generator "L" Terminal Circuit C
P0622 (9) Generator Field Circuit C
P0650  MIL Control Circuit B
P0654 (7) Engine Speed Circuit Fault C
P0700  TCM MIL Request A
P0701 (5) Transmission Control System Performance C
P0703  Brake Switch Circuit (Allison A/T) N/A
P0704  Clutch Pedal Switch B
P0706  Transmission Range Switch (4L80-E A/T) C
P0708  Transmission Range Switch (Allison A/T) A
P0711 (5) TFT Sensor Circuit - Range/Performance C
P0712 (5) TFT Sensor Circuit - Low Input C
P0713 (5) TFT Sensor Circuit - High Input C
P0716 (5) Turbine Speed Sensor Circuit - Performance (4) B
P0717 (5) Turbine Speed Sensor Circuit - No Signal (4) B
P0719  Brake Switch Circuit - Low Input (4L80-E A/T) C
P0721 (5) Output Speed Sensor Circuit - Performance A
P0722 (5) Output Speed Sensor Circuit - No Signal A
P0724  Brake Switch Circuit - High Input (4L80-E A/T) C
P0726 (5) Engine Speed Input Circuit - Performance B
P0727 (5) Engine Speed Input Circuit - No Signal B
P0730 (5) Incorrect Gear Ratio C
P0731 (5) Incorrect 1st Gear Ratio A
P0732 (5) Incorrect 2nd Gear Ratio A
P0733 (5) Incorrect 3rd Gear Ratio A
P0734 (5) Incorrect 4th Gear Ratio A
P0735 (5) Incorrect 5th Gear Ratio A
P0736 (5) Incorrect Reverse Ratio A
P0741 (5) TCC System - Stuck Off (4) B
P0742 (5) TCC System - Stuck On (4) B
P0743 (5) Torque Converter Clutch System Stuck Off B
P0746 (5) Solenoid "A" Controlled Clutch Stuck Off A
P0747 (5) Solenoid "A" Controlled Clutch Stuck On A
P0748 (5) PC Solenoid Circuit - Electrical Malfunction C
P0751 (5) 1-2 Shift Solenoid Valve Performance (4) B
P0752 (5) 1-2 Shift Solenoid Valve Performance - No 2nd Or 3rd Gear (4) B
P0753 (5) 1-2 Shift Solenoid Circuit - Electrical Malfunction (4) B
P0756 (5) 2-3 Shift Solenoid Valve Performance (4) A
P0757 (5) 2-3 Shift Solenoid Valve Performance - No 3rd Or 4th Gear (4) A
P0758 (5) 2-3 Shift Solenoid Circuit - Electrical Malfunction (4) A
P0763 (5) Shift Solenoid "C" Electrical A
P0768 (5) Shift Solenoid "D" Electrical A
P0773 (5) Shift Solenoid "D" Electrical A
P0776 (5) Solenoid "B" Controlled Clutch Stuck Off A
P0777 (5) Solenoid "B" Controlled Clutch Stuck On A
P0778 (5) Pressure Control Solenoid "B" Electrical A
P0785 (5) 3-2 Shift Solenoid Circuit - Electrical Malfunction (6) B
P0836 (5) 4 Wheel Drive Low Switch Circuit Malfunction N/A
P0840 (5) Transmission Pressure Switch Solenoid "C" Circuit A
P0841 (5) Transmission Pressure Switch Solenoid "C" Circuit - Stuck Open A
P0842 (5) Transmission Pressure Switch Solenoid "C" Circuit - Stuck Closed A
P0843 (5) Transmission Pressure Switch Solenoid "C" Circuit - High A
P0845 (5) Transmission Pressure Switch Solenoid "D" Circuit A
P0846 (5) Transmission Pressure Switch Solenoid "D" Circuit - Stuck Open A
P0847 (5) Transmission Pressure Switch Solenoid "D" Circuit - Stuck Closed A
P0848 (5) Transmission Pressure Switch Solenoid "D" Circuit - High A
P0870 (5) Pressure Switch "E" Circuit Malfunction A
P0871 (5) Pressure Switch Solenoid "E" Circuit - Stuck Open A
P0872 (5) Pressure Switch Solenoid "E" Circuit - Stuck Closed A
P0873 (5) Pressure Switch Solenoid "E" Circuit - High A
P0875 (5) Reverse Pressure Switch Circuit Malfunction A
P0876 (5) Reverse Pressure Switch Circuit - Stuck Open B
P0880 (5) TCM Power Input Signal C
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
P1120  Throttle Position Sensor 1 Voltage Out Of Range A
P1125  Accelerator Pedal Position Sensors Out Of Range Or Disagree A
P1133  HO2S Circuit - Insufficient Switching - Bank 1, Sensor 1 B
P1134  HO2S Transition Time Ratio - Bank 1, Sensor 1 B
P1153  HO2S Circuit - Insufficient Switching - Bank 2, Sensor 1 B
P1154  HO2S Transition Time Ratio - Bank 1 & 2, Sensor 1 B
P1172  Fuel Transfer With Secondary Pump C
P1220  Throttle Position Sensor 2 - Voltage Out Of Range A
P1221  Excessive Difference Between Throttle Position Sensors A
P1275  Accelerator Pedal Position Circuit - Sensor 1 C
P1276  Accelerator Pedal Position Sensor 1 Correlation C
P1280  Accelerator Pedal Position Circuit - Sensor 2 C
P1281  Accelerator Pedal Position Sensor 2 Correlation C
P1285  Accelerator Pedal Position Circuit - Sensor 3 C
P1286  Accelerator Pedal Position Sensor 3 Correlation C
P1336  Crankshaft System Variation Not Learned A
P1380  EBCM DTC Detected Rough Road Data Unstable C
P1381  Misfire Detected - No EBCM/PCM Serial Data C
P1404  EGR Valve Closed Pintle Position B
P1441  EVAP System Flow During Non-Purge B
P1514  Airflow Rate Excessive A
P1515  Predicted Vs Actual Throttle Position Correlation Error A
P1516  Predicted Vs Actual Throttle Position Correlation Error A
P1517  TAC Module Memory Error A
P1518  TAC Module Serial Data Fault A
P1571 (5) TCM Torque Request Circuit B
P1574 (10) Speed Decrease Without Brake Lights C
P1600  PCM Memory Performance A
P1621  PCM Memory Performance A
P1626 (11) Theft Deterrent System Loss Of Serial Communication C
P1627  PCM Memory Performance A
P1630 (11) PCM Unable To Learn Passlock™ Module Password C
P1631 (11) Theft Deterrent System Password Incorrect C
P1632 (11) Fuel Disable Or Undecided Password Sent From BCM C
P1635  5-Volt Reference 1 Circuit B
P1637 (9) Generator Turn-On Signal Circuit Voltage Out Of Range C
P1638 (9) Pulse Width Modulated Signal Out Of Range C
P1639  5-Volt Reference 2 Circuit B
P1644 (12) Torque Signal Voltage C
P1680  PCM Memory A
P1681  PCM Memory A
P1683  PCM Memory B
P1688 (5) Unmanaged Engine Torque Delivered to TCM B
P1709 (5) Transmission Pressure Switch Solenoid "E" Circuit A
P1710 (5) Transmission Pressure Switch Solenoid "E" Circuit - Stuck Open A
P1711 (5) Transmission Pressure Switch Solenoid "E" Circuit - Stuck Closed A
P1712 (5) Transmission Pressure Switch Solenoid "E" Circuit - High A
P1713 (5) Transmission Pressure Switch Reverse Circuit A
P1714 (5) Transmission Pressure Switch Reverse Circuit - Stuck Open B
P1720 (5) Solenoid "A" Controlled Clutch Not Engaged A
P1721 (5) Solenoid "B" Controlled Clutch Not Engaged A
P1723 (5) Solenoid "A" Controlled Clutch Engaged A
P1724 (5) Solenoid "B" Controlled Clutch Engaged A
P1760 (5) TCM Supply Voltage C
P1779 (5) Engine Torque Delivered To PCM B
P1781  TCM MIL Request Circuit B
P1810 (5) TFP Manual Valve Position Switch - Circuit Malfunction (4) B
P1860 (5) TCC PWM Solenoid Circuit - Electrical Malfunction (4) B
P1870 (5) Transmission Component Slipping (4) B
P1875 (5) 4WD Low Switch Circuit - Electrical Malfunction
 		 (4) 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) Code type is "C" on 8600 GVW or more vehicles.
(5) See appropriate DIAGNOSIS article in AUTOMATIC TRANSMISSIONS.
(6) Code type does not apply on 8600 GVW or more vehicles.
(7) See appropriate ANALOG INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT.
(8) See appropriate STARTERS article in STARTING & CHARGING SYSTEMS.
(9) See appropriate GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS.
(10) See appropriate CRUISE CONTROL SYSTEMS article in ACCESSORIES & EQUIPMENT.
(11) See appropriate ANTI-THEFT SYSTEMS article in ACCESSORIES & EQUIPMENT.
(12) See appropriate ANTI-LOCK article in BRAKES.
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