Engine Controls - Self-Diagnostics

• Introduction
• Self-Diagnostic System
  • Notes
  • On-Board Diagnostics
    • Pending Codes
  • Retrieving Diagnostic Trouble Codes
    • Using World Diagnostic System (WDS) Scan Tool To Retrieve DTCs
    • Using New Generation Star (NGS) Scan Tool To Retrieve DTCs
    • Using New Generation Star (NGS) Scan Tool To Retrieve Pending Codes
    • Using Generic Scan Tool
  • Freeze Frame Data
  • Parameter Identification
  • On-Board System Readiness Test Mode
  • Clearing Diagnostic Trouble Codes
    • Notes
    • Using Generic Scan Tool
  • Powertrain Control Module Location
• Diagnostic Monitoring Test Results
• Drive Cycles
  • Drive Modes
    • OBD-II Drive Mode Description
    • Mode 1 - PCM Adaptive Memory Produce Drive Mode
    • Mode 2 - EGR System Repair Verification Drive Mode
    • Mode 3 - HO2S Heater, HO2S & TWC Repair Verification Drive Mode
    • Mode 6 - EVAP System Repair Verification Drive Mode
• Summary
• Test Equipment
• Diagnostic Trouble Code Identification
• Diagnostic Tests
  • Notes
  • DTC P0031: Right Front Heated Oxygen Sensor Heater Circuit Low
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0032: Right Front Ho2S Heater Circuit High
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0037: Right Rear Ho2S Heater Circuit Low
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0038: Right Rear Ho2S Heater Circuit High
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0051: Left Front Ho2S Heater Circuit Low
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0052: Left Front Ho2S Heater Circuit High
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0057: Left Rear Ho2S Heater Circuit Low
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0058: Left Rear Ho2S Heater Circuit High
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0101: Mass Airflow Sensor Inconsistent With Throttle Position Sensor
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0102: Mass Airflow Sensor - Low Input
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0103: Mass Airflow Sensor - Low Input
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0106: EGR Boost Sensor Circuit - Performance Problem
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0107: EGR Boost Sensor Circuit - Low Input
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0108: EGR Boost Sensor Circuit - High Input
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0111: Intake Air Temperature Circuit - Performance Problem
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0112: Intake Air Temperature Sensor - Low Input
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0113: Intake Air Temperature Sensor - High Input
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0116: Engine Coolant Temperature Circuit - Performance Problem
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0117: Engine Coolant Temperature Sensor - Low Input
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0118: Engine Coolant Temperature Sensor - High Input
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0121: Throttle Position Sensor Stuck Closed/Open
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0122: Throttle Position Sensor - Low Input
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0123: Throttle Position Sensor - High Input
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0125: Excessive Time To Enter Closed Loop Fuel Control
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0126 & DTC P0128: Thermostat Stuck Open
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0131, DTC P0132, DTC P0151 Or DTC P0152
    • Notes
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0133 Or DTC P0153
    • Notes
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0134 Or DTC P0154
    • Notes
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0138 Or DTC P0158
    • Notes
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0140 Or DTC P0160
    • Notes
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0171 Or DTC P0174
    • Notes
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0172 Or DTC P0175
    • Notes
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0300: Random Misfire Detection
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0301, DTC P0302, DTC P0303, DTC P0304, DTC P0305 Or DTC P0306
    • Notes
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0327: Knock Sensor Circuit - Low Input
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0328: Knock Sensor Circuit - High Output
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0335: Crankshaft Position Sensor Circuit - Malfunction
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0340: Camshaft Position Sensor Circuit - Malfunction
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0401: EGR Flow Insufficient Detected
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0402: EGR Flow Excessive Detected
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0403: EGR Valve Stepper Motor Circuit - Malfunction
    • Notes
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0421 Or DTC P0431
    • Notes
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0441: EVAP System - Incorrect Purge Flow
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0442: EVAP System Leak Detected - Small Leak
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0443: EVAP System Purge Control Valve Circuit - Malfunction
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0446: EVAP System Vent Control - Malfunction
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0456: EVAP System Leak Detected - Very Small Leak
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0461: Fuel Gauge Sender Unit Circuit - Range/Performance
    • Detection Condition
    • Possible Cause
    • Diagnostic Procedures
  • DTC P0462: Fuel Gauge Sender Unit Circuit - Low Input
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0463: Fuel Gauge Sender Unit Circuit - High Input
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTCP0480: Fan Control Module Circuit - Malfunction
    • Notes
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0500: Vehicle Speed Sensor Circuit - Malfunction
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0505: Idle Air Control Valve Circuit - Malfunction
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0506: Idle Control System - Rpm Lower Than Expected
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0507: Idle Control System - Rpm Higher Than Expected
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0550: Power Steering Switch Malfunction
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0660: Intake Manifold Communication Control Circuit - Malfunction
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P0703: Brake Switch - Input Malfunction
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P1309: Pcm Internal Circuit - Malfunction
    • Detection Condition
    • Possible Cause
    • Diagnostic Procedures
  • DTC P1487: EGR Boost Sensor Solenoid Valve Circuit - Malfunction
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P1562: Pcm Backup Battery Voltage Low
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P1602: Immobilizer Unit To Pcm Communication Error
    • Notes
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P1603: Code Word Is Not Registered In Pcm
    • Detection Condition
    • Possible Cause
    • Diagnostic Procedures
  • DTC P1604: Key Id Numbers Not Registered In Pcm
    • Detection Condition
    • Possible Cause
    • Diagnostic Procedures
  • DTC P1621: Code Word Does Not Match After Engine Cranking
    • Detection Condition
    • Possible Cause
    • Diagnostic Procedures
  • DTC P1622: Key Id Number Does Not Match
    • Detection Condition
    • Diagnostic Procedures
  • DTC P1623: Code Word Or Key Id Number Read/Write Error In Pcm
    • Detection Condition
    • Possible Cause
    • Diagnostic Procedures
  • DTC P1624: Immobilizer System Communication Counter = 0
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P1631: Generator Output Voltage Signal No Electricity
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P1633: Battery Overcharge
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P1634: Generator Terminal B Circuit Open
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P2401: EVAP System Leak Detection Pump Motor - Circuit Low
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P2402: EVAP System Leak Detection Pump Motor - Circuit High
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P2404: EVAP System Leak Detection Pump - Air Filter Clogging
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P2405: EVAP System Leak Detection Pump - Orifice Fallen Off
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P2406: EVAP System Leak Detection Pump - Orifice Clogging
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC P2407: EVAP System Leak Detection Pump - Malfunction
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC U0073: Can Bus Off
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • DTC U0101: Pcm Cannot Receive Any Messages From TCM
    • Detection Condition
    • Possible Causes
    • Diagnostic Procedures
  • Reference Voltage
  • After Repair Procedure