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Engine Controls - Self-Diagnostics Expand All (for easy ctrl-f) Collapse All Introduction Self-Diagnostic System Programming Drive Cycles Summary Diagnostic Trouble Code Definitions Component Locations Connector Identification System Tests Diagnostic Tests Notes DTC P0030: Ho2S Heater Control Circuit Sensor 1 DTC P0036: Ho2S Heater Control Circuit Sensor 2 DTC P0101: MAF Sensor Performance DTC P0102: MAF Sensor Circuit - Low Frequency DTC P0103: MAF Sensor Circuit - High Frequency DTC P0106: Map System Performance DTC P0107: Map Sensor Circuit - Low Voltage DTC P0108: Map Sensor Circuit - High Voltage DTC P0112: IAT Sensor Circuit - Low Voltage DTC P0113: IAT Sensor Circuit - High Voltage DTC P0116: ECT Sensor Performance DTC P0117: ECT Sensor Circuit - Low Voltage DTC P0118: ECT Sensor Circuit - High Voltage DTC P0121: TP Sensor Performance DTC P0122: TP Sensor Circuit - Low Voltage DTC P0123: TP Sensor Circuit - High Voltage DTC P0125: Excessive Time To Enter Closed Loop Fuel Control DTC P0128: ECT Less Than Thermostat Regulating Temperature DTC P0130 & P0150: Ho2S Bank 1 & 2, Sensor 1 Circuit DTC P0131 & P0151: Ho2S Bank 1 & 2, Sensor 1 Circuit - Low Voltage DTC P0132 & P0152: Ho2S Bank 1 & 2, Sensor 1 Circuit - High Voltage DTC P0133 & P0153: Ho2S Bank 1, Sensor 1 Circuit - Slow Response DTC P0134 & P0154: Ho2S Bank 1 & 2, Sensor 1 Circuit - Insufficient Activity DTC P0135: Ho2S Bank 1, Sensor 1 Heater Circuit DTC P0137: Ho2S Bank 1, Sensor 2 Circuit - Low Voltage DTC P0138: Ho2S Bank 1, Sensor 2 Circuit - High Voltage DTC P0140: Ho2S Bank 1, Sensor 2 - Insufficient Activity DTC P0141: Ho2S Bank 1, Sensor 2 Heater Circuit DTC P0155: Ho2S Bank 2, Sensor 1 Heater Circuit DTC P0171 & P0174: Fuel Trim System Lean Bank 1 & 2 DTC P0172 & P0175: Fuel Trim System Rich Bank 1 & 2 DTC P0200-P0208: Fuel Injector Control Circuits DTC P0230: Fuel Pump Control Relay Circuit DTC P0300-P0308: Engine Misfire Detected DTC P0325: Knock Sensor Module Circuit DTC P0326: Knock Sensor Circuit Excessive Spark Retard DTC P0327: Knock Sensor Circuit - Low Voltage DTC P0335: Crankshaft Position Sensor A Circuit Performance DTC P0336: Crankshaft Position Sensor A Circuit Performance DTC P0340: Camshaft Position Sensor Circuit DTC P0341: Camshaft Position Sensor Circuit Performance DTC P0351-P0358: Ignition Coil Primary Secondary Circuit DTC P0385: Crankshaft Position Sensor B Circuit DTC P0386: Crankshaft Position Sensor B Circuit Performance DTC P0401: EGR System - Insufficient Flow DTC P0403: EGR Valve Control Circuit DTC P0404: EGR Valve Open Pintle Position DTC P0405: EGR Pintle Position Circuit - Low Voltage DTC P0410: Secondary Air Injection System DTC P0412: Secondary Air Injection Relay Control Circuit DTC P0418: Secondary Air Injection Pump Relay Control Circuit DTC P0420: TWC System - Low Efficiency DTC P0440: EVAP System - Large Leak DTC P0442: EVAP System - Small Leak DTC P0443: EVAP Purge Solenoid Control Circuit DTC P0446: EVAP Vent Valve Performance DTC P0449: EVAP Vent Valve Performance DTC P0452: Fuel Tank Pressure Sensor - Low Voltage DTC P0453: Fuel Tank Pressure Sensor - High Voltage DTC P0502: Vehicle Speed Sensor Low Output DTC P0503: Vehicle Speed Sensor Erratic DTC P0506: Idle Control System - Low Rpm DTC P0507: Idle Control System - High Rpm DTC P0601-P0607, P1600, P1621, P1627, P1680, P1681, P1683 & P2610: Pcm Memory DTC P0650: Mil Control Circuit DTC P0719: Brake Switch Circuit - Low Input DTC P0724: Brake Switch Circuit - High Input DTC P1031: Ho2S Heater Current Monitor Control Circuit Sensors 1 & DTC P1032: Ho2S Heater Warm Up Control Circuit Sensors 1 DTC P1106: Map System Performance DTC P1107: Map Sensor Circuit Low Voltage DTC P1111: IAT Sensor Circuit - Intermittent High Voltage DTC P1112: IAT Sensor Circuit - Intermittent Low Voltage DTC P1114: ECT Sensor Circuit - Intermittent Low Voltage DTC P1115: ECT Sensor Circuit - Intermittent High Voltage DTC P1121: TP Sensor Circuit - Intermittent High Voltage DTC P1122: TP Sensor Circuit - Intermittent Low Voltage DTC P1133 & P1153: Ho2S Bank 1 & 2, Sensor 1 - Insufficient Switching DTC P1134 & P1154: Ho2S Bank 1 & 2, Sensor 1 - Transition Time Ratio DTC P1336: Crankshaft System Variation Not Learned DTC P1359: Ignition Control Circuit Group A DTC P1360: Ignition Control Circuit Group B DTC P1372: Crankshaft Position Sensor Circuits Performance DTC P1380: EBCM DTC Detected Rough Road Data Unstable DTC P1381: Misfire Detected - No EBCM/Pcm Serial Data DTC P1404: EGR Valve Closed Pintle Position DTC P1415 & P1416: Air System - Bank 1 & 2 DTC P1441: EVAP System Flow During Non-Purge DTC P1624: Customer Snapshot Data Available DTC P1633: Ignition 0 Power Circuit - Low Voltage DTC P1634: Ignition 1 Power Circuit - Low Voltage DTC P1635: 5-Volt Reference 1 Circuit DTC P1639: 5-Volt Reference 2 Circuit Wiring Diagrams