Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2000CAB & CHASSIS K2500, 7.4 J, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 122 (ENGINE CONTROLS - SELF-DIAGNOSTICS - 4.8L, 5.3L & 6.0L)
2000 Chevrolet Cab & Chassis K2500, 7.4 J, Automatic
Section 122 (Engine Controls - Self-Diagnostics - 4.8L, 5.3L & 6.0L)
2000 Chevrolet Cab & Chassis K2500, 7.4 J, AutomaticSECTION Section 122 (Engine Controls - Self-Diagnostics - 4.8L, 5.3L & 6.0L)
WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, and 2002 Chevrolet Tahoe. 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 (EMI) and 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
- System Tests
- 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 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 P0131 & P0151: Ho2S Circuit - Low Voltage - Bank 1 & 2, Sensor 1 (W/Case Ground)
- DTC P0131 & P0151: Ho2S Circuit - Low Voltage - Bank 1 & 2, Sensor 1 (W/Isolated Ground)
- DTC P0132 & P0152: Ho2S Circuit - High Voltage - Bank 1 & 2, Sensor 1 (W/Case Ground)
- DTC P0132 & P0152: Ho2S Circuit - High Voltage - Bank 1 & 2, Sensor 1 (W/Isolated Ground)
- DTC P0133 & P0153: Ho2S Circuit - Slow Response - Bank 1 & 2, Sensor 1 (4.8L & 5.3L W/Case Ground)
- DTC P0133 & P0153: Ho2S Circuit - Slow Response - Bank 1 & 2, Sensor 1 (4.8L & 5.3L W/Isolated Ground)
- DTC P0133 & P0153: Ho2S Circuit - Slow Response - Bank 1 & 2, Sensor 1 (6.0L W/Isolated Ground)
- DTC P0134 & P0154: Ho2S Circuit - Insufficient Activity - Bank 1 & 2, Sensor 1 (4.8L & 5.3L W/Case Ground)
- DTC P0134 & P0154: Ho2S Circuit - Insufficient Activity - Bank 1 & 2, Sensor 1 (4.8L & 5.3L W/Isolated Ground)
- DTC P0134 & P0154: Ho2S Circuit - Insufficient Activity - Bank 1 & 2, Sensor 1 (6.0L W/Isolated Ground)
- DTC P0135, P0141, P0155 & P0161: Ho2S Heater Circuit - Bank 1 & 2, Sensors 1 & 2 (4.8L & 5.3L W/Case Ground)
- DTC P0135, P0141, P0155 & P0161: Ho2S Heater Circuit - Bank 1 & 2, Sensors 1 & 2 (4.8L & 5.3L W/Isolated Ground)
- DTC P0135 & P0155: Ho2S Heater Circuit - Bank 1 & 2, Sensors 1 (6.0L W/Isolated Ground)
- DTC P0137 & P0157: Ho2S Circuit - Low Voltage - Bank 1 & 2, Sensor 2 (W/Case Ground)
- DTC P0137 & P0157: Ho2S Circuit - Low Voltage - Bank 1 & 2, Sensor 2 (W/Isolated Ground)
- DTC P0138 & P0158: Ho2S Circuit - High Voltage - Bank 1 & 2, Sensor 2 (W/Case Ground)
- DTC P0138 & P0158: Ho2S Circuit - High Voltage - Bank 1 & 2, Sensor 2 (W/Isolated Ground)
- DTC P0140 & P0160: Ho2S Circuit - Insufficient Activity - Bank 1 & 2, Sensor 2 (W/Case Ground)
- DTC P0140 & P0160: Ho2S Circuit - Insufficient Activity - Bank 1 & 2, Sensor 2 (W/Isolated Ground)
- DTC P0141 & P0161: Ho2S Heater Circuit - Bank 1 & 2, Sensors 2 (6.0L W/Case Ground)
- DTC P0141 & P0161: Ho2S Heater Circuit - Bank 1 & 2, Sensors 2 (6.0L W/Isolated Ground)
- DTC P0171 & P0174: Fuel Trim System Lean - Bank 1 & 2
- DTC P0172 & P0175: Fuel Trim System Rich - Bank 1 & 2
- DTC P0178: Fuel Composition Sensor
- 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 (M/T)
- DTC P0502: Vehicle Speed Sensor Low Output (4L60-E Transmission)
- DTC P0502: Vehicle Speed Sensor Low Output (4L80-E Transmission)
- DTC P0503: Vehicle Speed Sensor Erratic (4L60-E Transmission)
- DTC P0503: Vehicle Speed Sensor Erratic (4L80-E Transmission)
- DTC P0506: Idle Control System - Low Rpm (With Electronic Throttle Control)
- DTC P0506: Idle Control System - Low Rpm (Without Electronic Throttle Control)
- DTC P0507: Idle Control System - High Rpm (With Electronic Throttle Control)
- DTC P0507: Idle Control System - High Rpm (Without Electronic Throttle Control)
- DTC P0601-P0607, P1600, P1621, P1627, P1680, P1681 & P1683: Pcm Memory
- DTC P0650: Mil Control Circuit
- DTC P0704: Clutch Pedal Switch
- DTC P0706: Transmission Range Switch
- DTC P0719: Brake Switch Circuit - Low Input (4L60-E Transmission)
- DTC P0719: Brake Switch Circuit - Low Input (4L80-E Transmission)
- DTC P0724: Brake Switch Circuit - High Input (4L60-E Transmission)
- DTC P0724: Brake Switch Circuit - High Input (4L80-E Transmission)
- 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 P1121: TP Sensor Circuit - Intermittent High Voltage
- DTC P1122: TP Sensor Circuit - Intermittent Low Voltage
- DTC P1125: Accelerator Pedal Position Sensors Out Of Range Or Disagree
- DTC P1133 & P1153: Ho2S Circuit - Insufficient Switching - Bank 1 & 2, Sensor 1 (4.8L & 5.3L W/Case Ground)
- DTC P1133 & P1153: Ho2S Circuit - Insufficient Switching - Bank 1 & 2, Sensor 1 (4.8L & 5.3L W/Isolated Ground)
- DTC P1133 & P1153: Ho2S Circuit - Insufficient Switching - Bank 1 & 2, Sensor 1 (6.0L W/Isolated Ground)
- DTC P1134 & P1154: Ho2S Transition Time Ratio - Bank 1 & 2, Sensor 1 (4.8L & 5.3L W/Case Ground)
- DTC P1134 & P1154: Ho2S Transition Time Ratio - Bank 1 & 2, Sensor 1 (4.8L & 5.3L W/Isolated Ground)
- DTC P1134 & P1154: Ho2S Transition Time Ratio - Bank 1 & 2, Sensor 1 (6.0L W/Isolated Ground)
- 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
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.