LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 2003 >> Chevy Express H2500 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 16 (Engine Controls Self-Diagnostics - 4.3L) >> Diagnostic Trouble Code Definitions
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Trouble Code Definitions

WARNING: This page is about a different variant/trim than selected.
DIAGNOSTIC TROUBLE CODE INDEX

DTC (1) Description (2) Code Type
BXXXX (3) Body Control System Malfunction (4)
CXXXX (3) Chassis Control System Malfunction (4)
P0016  Crankshaft Position-To-Camshaft Position Correlation B
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 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  Excessive 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
P0315  Crankshaft Position System Variation Not Learned A
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
P0442  EVAP System - Small Leak A
P0443  EVAP Purge Solenoid Control Circuit B
P0446  EVAP Vent System Blocked Or Restricted A
P0449  EVAP Canister Vent Solenoid Valve Control Circuit 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 (6) Fuel Level Sensor Circuit Performance C
P0462 (6) Fuel Level Sensor Circuit - Low Voltage C
P0463 (6) Fuel Level Sensor Circuit - High Voltage C
P0496  EVAP System High Purge Flow B
P0502 (5) Vehicle Speed Sensor Low Output B
P0503 (5) Vehicle Speed Sensor Erratic B
P0506  Idle Control System - Low RPM B
P0507  Idle Control System - High RPM B
P0522 (6) Engine Oil Pressure Sensor Circuit Low Voltage C
P0523 (6) Engine Oil Pressure Sensor Circuit High Voltage C
P0562 (7) Low System Voltage C
P0563 (7) High System Voltage C
P0601 - P0607  PCM Memory/Programming Malfunction A
P0608 (6) Vehicle Speed Circuit Fault C
P0609 (3) Vehicle Speed Signal Circuit - Low Voltage C
P0641  5-Volt Reference Circuit Out-Of-Range B
P0650  MIL Control Circuit B
P0651  Sensor Reference Voltage Circuit B
P0706 (5) Transmission Range Switch C
P0711 (5) TFT Sensor Circuit - Range/Performance C
P0712 (5) TFT Sensor Circuit - Low Input C
P0713 (5) TFT Sensor Circuit - High Input C
P0719 (5) Brake Switch Circuit Low/No Signal C
P0724 (5) Brake Switch Circuit High Input C
P0740 (5) TCC Solenoid Valve Circuit - Electrical Malfunction B
P0741 (5) TCC System High Slip Detected B
P0742 (5) TCC System Low Slip Detected B
P0748 (5) Pressure Control Solenoid Valve Circuit - Electrical Malfunction C
P0751 (5) 1-2 Shift Solenoid Valve Performance B
P0752 (5) 1-2 Shift Solenoid Valve Performance B
P0753 (5) 1-2 Shift Solenoid Circuit - Electrical Malfunction B
P0756 (5) 2-3 Shift Solenoid Valve Performance A
P0757 (5) 2-3 Shift Solenoid Valve Performance A
P0758 (5) 2-3 Shift Solenoid Circuit - Electrical Malfunction A
P0785 (5) 3-2 Shift Solenoid Circuit - Electrical Malfunction B
P0894 (5) Excessive TCC Slip B
P1106  MAP Sensor Circuit - Intermittent High Voltage C
P1107  MAP Sensor Circuit - Intermittent Low Voltage C
P1111  IAT Sensor Circuit - Intermittent High Signal Voltage C
P1112  IAT Sensor Circuit - Intermittent Low Signal Voltage C
P1114  ECT Sensor Circuit - Intermittent Low Signal Voltage C
P1115  ECT Sensor Circuit - Intermittent High Signal Voltage C
P1121  TP Sensor Circuit - Intermittent High Signal Voltage C
P1122  TP Sensor Circuit - Intermittent Low Signal Voltage C
P1133  HO2S Circuit - Insufficient Switching - Bank 1, Sensor 1 B
P1153  HO2S Circuit - Insufficient Switching - Bank 2, Sensor 1 B
P1258  Engine Over-Temperature Condition A
P1380  EBCM DTC Detected - Rough Road Data Unstable C
P1381  Misfire Detected - No EBCM/PCM Serial Data C
P1431 (6) Secondary Fuel Level Sensor - Lack Of Signal Variation C
P1432 (6) Secondary Fuel Level Sensor - Lower Than Normal Signal C
P1600  PCM Memory/Programming Malfunction A
P1621  PCM Memory/Programming Malfunction A
P1626 (8) Theft Deterrent System - Loss Of Serial Communication C
P1627  PCM Memory/Programming Malfunction A
P1631 (8) Theft Deterrent System - Password Incorrect C
P1637 (7) Generator Turn-On Signal Circuit Voltage Out Of Range C
P1638 (7) Generator Pulse Width Modulated Signal Out Of Range C
P1680  PCM Memory/Programming Malfunction A
P1681  PCM Memory/Programming Malfunction A
P1683  PCM Memory/Programming Malfunction A
P1810 (5) Invalid TFP Manual Valve Position Switch State B
P1860 (5) TCC PWM Solenoid Circuit - Electrical Malfunction B
P2610  PCM Memory/Programming Malfunction 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) Information is not available from manufacturer.
(5) See appropriate DIAGNOSIS article in AUTOMATIC TRANSMISSIONS.
(6) See appropriate ANALOG INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT.
(7) See appropriate GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS.
(8) See appropriate ANTI-THEFT SYSTEMS article in ACCESSORIES & EQUIPMENT.
scientia non olet · About LEMON Manuals