Engine Controls - Tests W/Codes

• Introduction
• Self-Diagnostic System
  • Notes
  • Retrieving & Erasing Codes
    • Notes
    • On-Board Diagnostics (OBD) II
  • Trouble Code Identification
  • ECM Location
  • Drive Cycles
    • Resetting Readiness Codes
• Component Locations
• Summary
• Circuit Tests
  • Connector Identification
  • DTC 112: Fault In ECM
  • DTC 115, 125, 135, 145, 155 & 165: Fuel Injector Problem
  • DTC 121: MAF Signal
  • DTC 123: Engine Coolant Temperature Sensor Signal
  • DTC 125: Fuel Injector Problem
  • DTC 131: Rpm Sensor Signal
  • DTC 132: Battery Voltage Signal Too Low Or Too High
  • DTC 135: Fuel Injector Problem
  • DTC 143: Front Knock Sensor Signal Or DTC 433: Rear Knock Sensor Signal
  • DTC 145: Fuel Injector Problem
  • DTC 153: Rear Ho2S Signal
  • DTC 155: Fuel Injector Problem
  • DTC 165: Fuel Injector Problem
  • DTC 211: Co Potentiometer
  • DTC 212: Front Ho2S Signal
  • DTC 214: Rpm Sensor Signal Sporadic
  • DTC 223: IAC Valve Signal Opening Or DTC 245: IAC Valve Signal Closing
  • DTC 225: A/C Pressure Sensor
  • DTC 231: Long Term Fuel Trim Partial Load Or DTC 232: Long Term Fuel Trim Idling
  • DTC 233: Idle Air Trim
  • DTC 311: Speedometer Signal
  • DTC 314: Camshaft Position Sensor Signal
  • DTC 315: Canister Purge (Cp) System
  • DTC 335: Fault In Wiring Between TCM & ECM
  • DTC 411: Throttle Position Sensor Signal
  • DTC 425: Rear Ho2S
  • DTC 435: Front Ho2S Too Slow
  • DTC 436: Rear Ho2S Compensation
  • DTC 442: Pulsed Secondary Air Injection System (Pair) Flow Fault
    • Notes
    • Fault Conditions
    • Possible Causes
    • Diagnosis
  • DTC 443: TWC Efficiency
  • DTC 444: Accelerometer Signal
  • DTC 445: Pulsed Secondary Air Injection System (Pair) Pump Signal
    • Notes
    • Fault Conditions
    • Substitute Value
    • Possible Source (Signal Too High)
    • Possible Source (Signal Too Low)
    • Diagnosis
  • DTC 446: Pulsed Secondary Air Injection System (Pair) Pump Flow Fault
    • Notes
    • Fault Conditions
    • Substitute Value
    • Possible Causes
    • Diagnosis
  • DTC 447: Pulsed Secondary Air Injection System (Pair) Solenoid Valve Signal
    • Notes
    • Fault Condition
    • Substitute Valve
    • Possible Causes (Signal Too High)
    • Possible Causes (Signal Too Low)
    • Possible Causes (Signal Missing)
    • Diagnosis
  • DTC 448: Pulsed Secondary Air Injection System (Pair) Pump Flow Fault
    • Notes
    • Fault Condition
    • Substitute Value
    • Possible Causes (Flow Too High)
    • Possible Causes (Flow Too Low)
    • Diagnosis
  • Misfire DTC 451, 452, 453, 454, 455, 456, 543, 545, 551, 552, 553, 554, 555 & 556
  • DTC 514: Engine Cooling Fan Half Speed
  • DTC 521: Front Ho2S Preheating Or DTC 522: Rear Ho2S Preheating
  • DTC 534: Ignition Discharge Module (IDM) Group "D"
  • DTC 536: Ignition Discharge Module (IDM) Group "E"
  • DTC 541: Canister Purge Valve Signal
  • DTC 666: DTC In Transmission Control Module (TCM)