A L L Diagnostic Trouble Codes ( DTC )

• Testing and Inspection
  • Manufacturer Code Charts
    • DTC 13
    • DTC 14
    • DTC 15
    • DTC 21
    • DTC 22
    • DTC 24
    • DTC 32
      • Greater Than or Equal to 8500 GVW
      • Less Than 8500 GVW
    • DTC 33
    • DTC 34
    • DTC 35
    • DTC 42
    • DTC 43
    • DTC 44
    • DTC 45
    • DTC 51
    • DTC 52
    • DTC 53
    • DTC 54
    • DTC 55
  • Related Tests, Information and Procedures
    • A Charts
      • Chart A-1 No Service Engine Soon Light
      • Chart A-2 Won't Flash Code 12 Service Engine Light On
      • Chart A-3 Engine Cranks But Will Not Run
      • Chart A-4 Injector Circuit Diagnosis
      • Chart A-5 Fuel Pump Relay Circuit Diagnosis (One Fuel Tank)
      • Chart A-5A Fuel Pump Relay Circuit Diagnosis (Two Fuel Tanks)
      • Chart A-6 Fuel System Pressure Test
    • C Charts
      • Chart C-1A Park/Neutral Switch Diagnosis
      • Chart C-1B Crank Signal Diagnosis
      • Chart C-1D Manifold Absolute Pressure (MAP) Output Check
      • Chart C-2 Idle Air Control (IAC) System Check
      • Chart C-2 Idle Speed Control (ISC) Circuit
      • Chart C-4B Ignition System Check
      • Chart C-5 Electronic Spark Control (ESC) Check
      • Chart C-6C Air Management Check (EAC) Valve
      • Chart C-7 EGR System Check (Over 8500 GVW)
      • Chart C-7 EGR System Check (Under 8500 GVW)
      • Chart C-8 Transmission Converter Clutch (Under 8500 GVW)
      • Chart C-8A THM 400 Transmission Downshift Control
      • Chart C-8B Man. Trans. Shift Light Check (Below 8500 GVW)
      • Chart C-9A ECM QDR Check Procedure
      • Chart C-10A A/C ON Signal Diagnosis