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Diagnostic Trouble Code Definitions

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Suburban, and 2003 Chevrolet Silverado. 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  Mass Air Flow Sensor Circuit - Low Frequency B
P0103  Mass Air Flow 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 (Sierra & Silverado) B
P0116  ECT Sensor Performance (Avalanche, Suburban & Yukon XL) B
P0117  ECT Sensor Circuit - Low Voltage B
P0118  ECT Sensor Circuit - High Voltage B
P0120  TP Sensor Circuit A
P0125  Excess Time To Enter Closed Loop Fuel Control (Sierra & Silverado) B
P0125  Excess Time To Enter Closed Loop Fuel Control (Avalanche, Suburban & Yukon XL) B
P0128  ECT Less Than Thermostat Regulating Temperature (Sierra & Silverado) B
P0128  ECT Less Than Thermostat Regulating Temperature (Avalanche, Suburban & Yukon XL) 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
P0220  Throttle Position Sensor 2 Circuit A
P0230  Fuel Pump Control Relay Circuit B
P0300  Engine Misfire Detected B
P0315  Crankshaft Position Sensor Variation Not Learned A
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  Camshaft Position Sensor Signal Low B
P0343  Camshaft Position Sensor Signal High B
P0351-P0358  Ignition Control Circuit B
P0401  EGR System - Insufficient Flow A
P0404  EGR Valve Open Pintle Position B
P0405  EGR Valve Pintle Position Circuit - Low Voltage B
P0420  TWC System - Low Efficiency - Bank 1 A
P0430  TWC System - Low Efficiency - Bank 2 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
P0455  EVAP System Leak Detected - Gross Leak/No Flow A
P0461 (4) Fuel Level Sensor Circuit Performance C
P0462 (4) Fuel Level Sensor Circuit - Low Voltage C
P0463 (4) Fuel Level Sensor Circuit - High Voltage C
P0496  EVAP System High Purge Flow B
P0500 (5) Vehicle Speed Sensor B
P0506  Idle Control System - RPM Low B
P0507  Idle Control System - RPM High B
P0522 (4) Engine Oil Pressure Sensor Circuit Low Voltage C
P0523 (4) Engine Oil Pressure Sensor Circuit High Voltage C
P0530 (6) A/C Refrigerant Pressure Sensor Circuit C
P0562 (7) Low System Voltage C
P0563 (7) High System Voltage C
P0567 (8) Cruise Control Resume/Accel Switch Circuit C
P0568 (8) Cruise Control Set/Coast Switch Circuit C
P0571 (8) Cruise Control Brake Switch Circuit C
P0601-P0607  PCM Memory A
P0608 (4) Vehicle Speed Circuit Fault C
P0609 (3) Vehicle Speed Signal Circuit - Low Voltage C
P0615 (3) Starter Relay Circuit C
P0641  5-Volt Reference Circuit Out Of Range B
P0650  Malfunction Indicator Lamp Control Circuit B
P0651  Sensor Reference Voltage "B" Circuit/Open B
P0654 (4) Engine Speed Circuit Fault C
P0700  Transmission Control System (MIL Request) A
P0704 (9) Clutch Pedal Switch Input Circuit B
P0706 (10) Transmission Range Switch C
P0802  Transmission Control System MIL Request Circuit Open B
P1106  MAP Sensor Circuit Intermittent High Voltage C
P1107  MAP Sensor Circuit Intermittent Low Voltage C
P1111  Intake Air Temperature Sensor Circuit - Intermittent High Voltage C
P1112  Intake Air Temperature Sensor Circuit - Intermittent Low Voltage C
P1114  Engine Coolant Temperature Sensor Circuit - Intermittent Low Voltage C
P1115  Engine Coolant Temperature Sensor Circuit - Intermittent High Voltage C
P1125  Accelerator Pedal Position Sensors Out Of Range Or Disagree A
P1133  HO2S Circuit - Insufficient Switching - Bank 1, Sensor 1 B
P1153  HO2S Circuit - Insufficient Switching - Bank 2, Sensor 1 B
P1172  Secondary Fuel Pump Transfer Malfunction C
P1258 (11) Engine Over-Temperature Condition 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
P1514  Airflow Rate Excessive A
P1515  Predicted VS Actual Throttle Position Correlation Error A
P1516  Predicted VS Actual Throttle Position Correlation Error A
P1518  Throttle Actuator Control Module Serial Data Fault A
P1571 (10) Requested Torque Signal Circuit Malfunction B
P1574 (8) Stop Light Switch Transition Malfunction C
P1600  PCM Memory A
P1621  PCM Memory A
P1626 (12) Passlock® System Malfunction C
P1627  PCM Memory A
P1631 (12) Passlock® System Malfunction C
P1637 (7) Generator "L" Terminal Circuit - Improper Voltage Level C
P1638 (7) Generator Field Duty Cycle Signal Circuit Out Of Range C
P1680  PCM Memory A
P1681  PCM Memory A
P1683  PCM Memory B
P2066 (4) Secondary Fuel Level Sensor Signal Lack Of Variation C
P2067 (4) Secondary Fuel Level Sensor Signal Lower Than Normal C
P2068 (4) Secondary Fuel Level Sensor Signal Higher Than Normal C
P2108  Throttle Actuator Control Module Circuit Fault A
P2120  APP Sensor 1 Signal Or APP Sensor 5-Volt Reference Out Of Range C
P2121  APP Sensor 1 Signal And APP Sensor 2 Signal Circuits Out Of Correlation C
P2125  APP Sensor 2 Signal Or APP Sensor 5-Volt Reference Out Of Range C
P2135  TP Sensors No. 1 & 2 Signals Disagree Or Signal Voltages Out Of Range A
P2610  PCM Memory A
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 ANALOG INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT.
(5) On vehicles equipped with A/T, see appropriate DIAGNOSIS article in AUTOMATIC TRANSMISSIONS. On vehicles equipped with M/T, see appropriate DIAGNOSIS article in MANUAL TRANSMISSIONS.
(6) See appropriate A/C-HEATER SYSTEMS article in AIR CONDITIONING & HEATING.
(7) See appropriate GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS.
(8) See appropriate CRUISE CONTROL SYSTEMS article in ACCESSORIES & EQUIPMENT.
(9) see appropriate DIAGNOSIS article in MANUAL TRANSMISSIONS.
(10) See appropriate DIAGNOSIS article in AUTOMATIC TRANSMISSIONS.
(11) See appropriate ELECTRIC COOLING FANS article in ENGINES.
(12) See appropriate ANTI-THEFT SYSTEMS article in ACCESSORIES & EQUIPMENT.
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