A L L Diagnostic Trouble Codes ( DTC )

• Testing and Inspection
  • Diagnostic Trouble Code Descriptions
  • Manufacturer Code Charts
    • DTC 13
    • DTC 14
    • DTC 15
    • DTC 16
    • DTC 21
    • DTC 22
    • DTC 24
    • DTC 26
      • Part 1 of 3
      • Part 2 of 3
        • 3T40 Transmission
        • 4T60 Transmission
      • Part 3 of 3
    • DTC 27
    • DTC 28
    • DTC 29
    • DTC 31
    • DTC 34
    • DTC 38
      • Brake Light Switch
      • Powertrain Controls - ECM/PCM
    • DTC 39
      • 3T40 Transmission
      • 4T60 Transmission
    • DTC 42
    • DTC 43
    • DTC 44
    • DTC 45
    • DTC 46
    • DTC 48
    • DTC 51
  • Related Tests, Information and Procedures
    • A Charts
      • Chart A-1 No Service Engine Soon Light
      • Chart A-2 Won't Flash DTC 12 No Serial Data MIL On Steady
      • Chart A-3 Engine Cranks But Will Not Run
        • Part 1 of 2
        • Part 2 of 2
      • Chart A-5 Fuel System Electrical Test
      • Chart A-7 Fuel System Diagnosis
        • Part 1 of 4
        • Part 2 of 4
        • Part 3 of 4
        • Part 4 of 4
    • C Charts
      • Chart C-2A Fuel Injector Balance Test
      • Chart C-2B Idle Air Control (IAC) System Check
      • Chart C-3 Evaporative Emission Control System
      • Chart C-4D-1 Ignition Misfire at Idle
      • Chart C-4D-2 Ignition Misfire Under Load
      • Chart C-5 Electronic Spark Control (ESC) Check
      • Chart C-8A 3T40 Torque Converter Clutch
      • Chart C-8B Torque Converter Clutch (TCC) Diagnosis
        • Part 1 of 2
        • Part 2 of 2
      • Chart C-10 A/C Clutch Control Circuit Diagnosis
        • Part 1 of 2
        • Part 2 of 2
      • Chart C-12A Coolant Fan Functional Check
      • Chart C-12B Coolant Fan Control Circuit
      • Chart C-12C Coolant Fan Control Circuit
      • Chart C-16 ECM Controlled Temp Light Circuit