Section 85 (Engine Controls - Self-Diagnostics - 8.1L)
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.
- Model Identification
- Introduction
- Self-Diagnostic System
- On-Board Diagnostics
- Intermittent Conditions
- Notes
- Preliminary
- Harness or Connector Intermittents
- Electrical Connections or Wiring
- Control Module Power & Grounds, & Component Power & Grounds
- Temperature Sensitivity
- Electromagnetic Interference & Electrical Noise
- Incorrect PCM Programming
- Duplicating Failure Conditions
- Scan Tool Snapshot
- Vehicle Data Recorder
- Diagnostic Procedure
- Retrieving Diagnostic Trouble Codes
- Diagnostic System Check - Engine Controls
- Clearing Diagnostic Trouble Codes
- Scan Tool Usage
- Powertrain Control Module Location
- Programming
- Inspection/Maintenance Procedures
- Drive Cycles
- Inspection/Maintenance System Check
- Inspection/Maintenance Complete System Set Procedure
- Inspection/Maintenance Catalyst System Set Procedure
- Inspection/Maintenance Exhaust Gas RECIRCULATION System Set Procedure
- Inspection/Maintenance Evaporative Emission System Set Procedure
- Inspection/Maintenance Heated Oxygen Sensor/Oxygen Sensor System Set Procedure
- Inspection/Maintenance Heated Oxygen Sensor Heater System Set Procedure
- Summary
- Diagnostic Trouble Code Definitions
- Component Locations
- Connector Identification
- Diagnostic Tests
- Notes
- DTC P0101: Mass Air Flow 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 P0125: Excessive Time To Enter Closed Loop Fuel Control
- DTC P0128: ECT Less Than Thermostat Regulating Temperature
- DTC P0131 & P0151: Ho2S Circuit - Low Voltage - Bank 1 & 2, Sensor 1
- DTC P0132 & P0152: Ho2S Circuit - High Voltage - Bank 1 & 2, Sensor 1
- DTC P0133 & P0153: Ho2S Circuit - Slow Response - Bank 1 & 2, Sensor 1
- DTC P0134 & P0154: Ho2S Circuit - Insufficient Activity - Bank 1 & 2, Sensor 1
- DTC P0135 & P0155: Ho2S Heater Circuit - Bank 1 & 2, Sensor 1
- DTC P0137 & P0157: Ho2S Circuit - Low Voltage - Bank 1 & 2, Sensor 2
- DTC P0138 & P0158: Ho2S Circuit - High Voltage - Bank 1 & 2, Sensor 2
- DTC P0140 & P0160: Ho2S Circuit - Insufficient Activity - Bank 1 & 2, Sensor 2
- DTC P0141: Ho2S Heater Circuit - Bank 1, Sensor 2
- DTC P0161: Ho2S Heater Circuit - Bank 2, Sensors 2
- DTC P0171 & P0174: Fuel Trim System Lean - Bank 1 & 2
- DTC P0172 & P0175: Fuel Trim System Rich - Bank 1 & 2
- DTC P0200: Fuel Injector Control Circuit
- DTC P0230: Fuel Pump Control Relay Circuit
- DTC P0300-P0308: Engine Misfire Detected
- DTC P0325: Knock Sensor Module Circuit
- DTC P0327 & P0332: Knock Sensor Circuit - Low Voltage
- DTC P0335: Crankshaft Position Sensor Circuit
- DTC P0336: Crankshaft Position Sensor Circuit Performance
- DTC P0341: Camshaft Position Sensor Circuit Performance
- DTC P0342: CMP Signal Low
- DTC P0343: CMP Signal High
- DTC P0351-P0358: Ignition Control Circuit
- DTC P0401: EGR System - Insufficient Flow
- DTC P0404: EGR Valve Open Pintle Position
- DTC P0405: EGR Pintle Position Circuit - Low Voltage
- DTC P0420 & P0430: TWC System - Low Efficiency - Bank 1 & 2
- 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 P0500: Vehicle Speed Sensor (ALLISON A/T)
- DTC P0500: Vehicle Speed Sensor (M/T)
- DTC P0502: Vehicle Speed Sensor Low Output (4L80-E A/T)
- DTC P0503: Vehicle Speed Sensor Erratic (4L80-E A/T)
- DTC P0506 & P0507: Idle Control System - Low Or High Rpm
- DTC P0601-P0607, P1600, P1621, P1627, P1680, P1681 & P1683: Pcm Memory
- DTC P0650: Mil Control Circuit
- DTC P0700: TCM Mil Request
- DTC P0703: Brake Switch Circuit (ALLISON A/T)
- DTC P0704: Clutch Pedal Switch
- DTC P0706: Transmission Range Switch (4L80-E A/T)
- DTC P0708: Transmission Range Switch (ALLISON A/T)
- DTC P0719: Brake Switch Circuit - Low Input (4L80-E A/T)
- DTC P0724: Brake Switch Circuit - High Input (4L80-E A/T)
- 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 P1120: Throttle Position Sensor 1 Voltage Out Of Range
- DTC P1125: Accelerator Pedal Position Sensors Out Of Range Or Disagree
- DTC P1133 & P1153: Ho2S Circuit - Insufficient Switching - Bank 1 & 2, Sensor 1
- DTC P1134 & P1154: Ho2S Transition Time Ratio - Bank 1 & 2, Sensor 1
- DTC P1172: Fuel Transfer With Secondary Pump
- DTC P1220: Throttle Position Sensor 2 - Voltage Out Of Range
- DTC P1221: Excessive Difference Between Throttle Position Sensors
- DTC P1275: Accelerator Pedal Position Circuit - Sensor 1
- DTC P1276: Accelerator Pedal Position Sensor 1 Correlation
- DTC P1280: Accelerator Pedal Position Circuit - Sensor 2
- DTC P1281: Accelerator Pedal Position Sensor 2 Correlation
- DTC P1285: Accelerator Pedal Position Circuit - Sensor 3
- DTC P1286: Accelerator Pedal Position Sensor 3 Correlation
- DTC P1336: Crankshaft System Variation Not Learned
- 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 P1441: EVAP System Flow During Non-Purge
- DTC P1514: Airflow Rate Excessive
- DTC P1515: Predicted Vs Actual Throttle Position Correlation Error
- DTC P1516: Predicted Vs Actual Throttle Position Correlation Error
- DTC P1517: TAC Module Memory Error
- DTC P1518: TAC Module Serial Data Fault
- DTC P1635: 5-Volt Reference 1 Circuit
- DTC P1639: 5-Volt Reference 2 Circuit
- DTC P1781: TCM Mil Request Circuit