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.
2002 Chevrolet Tracker 2D Utility, 4WD, AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Control System Self-Diagnostics - 2.0L
- 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
- Pcm Location
- Programming
- Inspection/Maintenance Procedures
- Drive Cycles
- Inspection/Maintenance System Check
- Inspection/Maintenance Complete System Set Procedure
- Inspection/Maintenance System DTC
- Inspection/Maintenance Catalyst System Set Procedure
- Inspection/Maintenance EGR System Set Procedure
- Inspection/Maintenance EVAP System Set Procedure
- Inspection/Maintenance Heated Oxygen Sensor/Oxygen Sensor (Ho2S/O2S) System Set Procedure
- Inspection/Maintenance Heated Oxygen Sensor (Ho2S) System Set Procedure
- Summary
- Diagnostic Trouble Code Definitions
- Component Locations
- Connector Identification
- System Tests
- Diagnostic Tests
- Notes
- DTC P0031: Ho2S Heater Control Circuit - Low Voltage (Sensor 1)
- DTC P0032: Ho2S Heater Control Circuit - High Voltage (Sensor 1)
- DTC P0037: Ho2S Heater Control Circuit - Low Voltage (Sensor 2)
- DTC P0038: Ho2S Heater Control Circuit - High Voltage (Sensor 2)
- DTC P0101: Mass Air Flow Sensor Performance
- DTC P0102: MAF Sensor Circuit - Low Voltage
- DTC P0103: MAF Sensor Circuit - High Frequency
- DTC P0107: Manifold Absolute Pressure Sensor Circuit - Low Voltage
- DTC P0108: Manifold Absolute Pressure Sensor Circuit - High Voltage
- DTC P0111: IAT Sensor Performance
- DTC P0112: IAT Sensor Circuit - Low Voltage
- DTC P0113: IAT Sensor Circuit - High Voltage
- DTC P0116: ECT Sensor Circuit Performance
- DTC P0117: ECT Sensor Circuit - Low Voltage
- DTC P0118: ECT Sensor Circuit - High Voltage
- DTC P0121: Throttle Position Sensor Performance
- DTC P0122: Throttle Position Sensor Circuit - Low Voltage
- DTC P0123: Throttle Position Sensor Circuit - High Voltage
- DTC P0125: ECT Excessive Time To Enter Closed Loop
- DTC P0128: Engine Coolant Temperature Less Than Thermostat Regulating Temperature
- DTC P0131: Ho2S Circuit - Low Voltage (Sensor 1)
- DTC P0132: Ho2S Circuit - High Voltage (Sensor 1)
- DTC P0133: Ho2S Slow Response (Sensor 1)
- DTC P0134: Ho2S Circuit Insufficient Activity (Sensor 1)
- DTC P0137: Ho2S Circuit - Low Voltage (Sensor 2)
- DTC P0138: Ho2S Circuit (Sensor 2)
- DTC P0140: Ho2S Circuit (Sensor 2)
- DTC P0171: Lean Fuel Trim System
- DTC P0172: Rich Fuel Trim System
- DTC P0300: Engine Misfire Detected
- DTC P0301-P0304: Cylinder Misfire Detected
- DTC P0327: Knock Sensor Circuit - Low Voltage
- DTC P0328: Knock Sensor Circuit - High Voltage
- DTC P0335: Crankshaft Position Sensor Circuit
- DTC P0340: Camshaft Position Sensor Circuit
- DTC P0400: EGR System
- DTC P0401: EGR System
- DTC P0402: EGR System
- DTC P0403: EGR Solenoid Control Circuit
- DTC P0420: Catalyst System Low Efficiency
- DTC P0441: EVAP System - No Flow During Purge
- DTC P0442: EVAP System - Leak Detected
- DTC P0443: EVAP System - Purge Solenoid Control Circuit
- DTC P0446: EVAP Vent System Performance
- DTC P0449: EVAP Vent System Performance
- DTC P0451: Fuel Tank Pressure Sensor Performance
- DTC P0452: Fuel Tank Pressure Sensor Circuit - Low Voltage
- DTC P0453: Fuel Tank Pressure Sensor Circuit - High Voltage
- DTC P0455: EVAP System - Leak Detected
- DTC P0496: EVAP System - Flow During Non-Purge
- DTC P0506: Idle Speed - Low
- DTC P0507: Idle Speed - High
- DTC P0601-P0607, P1600, P1621, P1627, P1680, P1681 Or P1683: Control Module Read Only Memory
- DTC P1450: Barometric Pressure Sensor Circuit
- DTC P1451: Barometric Pressure Sensor Performance
- DTC P1500: Start Switch Circuit
- DTC P1510: Control Module Long Term Memory Reset
Factory Service Tools
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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.