Engine Controls - Tests W/Codes - 3.8L PFI

• Introduction
• Self-Diagnostic System
  • Notes
  • Hard Failures
  • Intermittent Failures
  • Diagnostic Procedure
  • Retrieving Codes (Non-Scan)
  • Reading Trouble Codes
  • Trouble Code Definition
  • Hard Or Intermittent Trouble Code Determination
  • Clearing Trouble Codes
  • ECM/Pcm Location
  • Diagnostic Materials
    • Diagnostic Aids
    • Field Service Mode Check
  • Special Tools (Diagnostic)
  • Scan Tester Usage
  • Scan Data
  • Test Procedure Summary
• Diagnostic Flow Charts
  • Notes
  • Code 13, Open Oxygen Sensor Circuit
    • Notes
    • Diagnostic Aids
  • Code 14, Coolant Temperature Sensor Signal Voltage Low
    • Notes
    • Diagnostic Aids
  • Code 15, Coolant Temperature Sensor Signal Voltage High
    • Notes
    • Diagnostic Aids
  • Code 16, System Voltage High
    • Notes
    • Diagnostic Aids
  • Code 21, Throttle Position Sensor Signal Voltage High
    • Notes
    • Diagnostic Aids
  • Code 22, Throttle Position Sensor Signal Voltage Low
    • Notes
    • Diagnostic Aids
  • Code 23, Mat Sensor Signal Voltage High
    • Notes
    • Diagnostic Aids
  • Code 24, Vehicle Speed Sensor (VSS)
  • Code 25, Mat Sensor Signal Voltage Low
    • Notes
    • Diagnostic Aids
  • Code 26, (1 Of 3) Quad-Driver Circuit
    • Notes
    • Diagnostic Aids
    • Hot Light Diagnosis
  • Code 26, (2 Of 3) Quad-Driver Circuit
    • Notes
    • Diagnostic Aids
  • Code 26, (3 Of 3) Quad-Driver Circuit
  • Code 27, 28 Or 29, Gear Switch Circuits
    • Notes
    • Diagnostic Aids
  • Code 31, Park/Neutral Switch Circuit
  • Code 33, Map Sensor Signal Voltage High
    • Notes
    • Diagnostic Aids
  • Code 34, Map Sensor Signal Voltage Low
    • Notes
    • Diagnostic Aids
  • Code 34, MAF Sensor Signal Voltage Low
    • Notes
    • Diagnostic Aids
    • Poor Connections
    • Harness
    • Intermittents
  • Code 35, IAC Idle Speed Error
    • Notes
    • Diagnostic Aids
    • System Too Lean
    • System Too Rich
    • Throttle Body
    • IAC Valve Connections
    • PCV Valve
  • Code 35, IAC Idle Speed Error Using Tech I
    • Notes
    • Diagnostic Aids
    • System Too Lean
    • System Too Rich
    • Throttle Body
    • IAC Valve Connections
    • PCV Valve
  • Code 38, Brake Switch Circuit
    • Notes
    • Diagnostic Aids
    • If Code 26 is set with Code 38, see Code 26 chart.
  • Code 39, With 4T60 (440-T4) Trans. TCC Circuit
    • Notes
    • Diagnostic Aids
  • Code 39, With 4T60, TCC Circuit Using Tech 1
    • Notes
    • Diagnostic Aids
  • Code 41, Cam Sensor Circuit
    • Notes
    • All Updated Information
    • Circuit Description
    • Test Description
    • Diagnostic Aids
    • Schematic & Flow Chart
  • Code 42, Est Circuit Open Or Grounded
    • Notes
    • Diagnostic Aids
    • Poor Connection
    • Intermittents
  • Code 43, ESC Error Without ESC Module
    • Notes
    • Diagnostic Aids
  • Code 44, Lean Exhaust Indication
    • Notes
    • Diagnostic Aids
    • Oxygen Sensor (O2) Wire
    • Fuel Contamination
    • Fuel Pressure
    • Exhaust Leaks
    • Misfire Or Stall
  • Code 45, Rich Exhaust Indication
    • Notes
    • Diagnostic Aids
    • Fuel Pressure High
    • Ignition Ground
    • Evaporative Fuel Canister
    • MAP Sensor
    • TPS
    • O2 Sensor Contamination
    • EGR Problem
  • Code 46, Power Steering Pressure Switch
    • Notes
    • Diagnostic Aids
  • Code 48, Misfire Diagnosis
    • Notes
    • Ignition System Checks
    • Fuel System Checks
    • Basic Engine Checks
  • Code 51, Faulty Prom/Mem-Cal
  • Code 52, Faulty CALPAK
  • Code EO51, Faulty Prom/Mem-Cal
  • Code 63, 64 Or 65, EGR Flow Check Error
  • Code 63, 64 Or 65, EGR Flow Check Error Using Tech 1