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GM OBD Trouble Code 39

Torque Converter Clutch Error

Clutch Switch Circuit Error

  • Depending on the model, code 39 can refer to two different systems.
  • Please choose from one of the above links for specific information on each system.

Torque Converter Clutch Error

The ECM monitors the operation of the Torque Converter Clutch. Code 39 will set when the Torque Converter Clutch operation does not meet factory specifications.

Fault Code Description

  • 39 - Torque Converter Clutch error

Symptoms

  • Slight increase in engine RPM at freeway speeds

Common Problems

  • Faulty Torque Converter Clutch solenoid
  • Failed Torque Converter or damaged seal

Clutch Switch Circuit Error

On vehicles with manual transmissions, the ECM monitors the position of the clutch pedal.

Fault Code Description

  • 39 - Clutch switch circuit error

Symptoms

  • Engine may not start

Common Problems

  • Faulty Clutch Pedal Position switch

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