GM OBD Trouble Code 90

Torque Converter Clutch Error

The ECM monitors the operation of the Torque Converter Clutch. Code 90 will set when the Torque Converter Clutch operation does not meet factory specifications.

Fault Code Description

  • 90 - Torque Converter Clutch error


  • Slight increase in engine RPM at freeway speeds

Common Problems

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

Related Questions

See what others have asked about this, or visit the Questions page to ask your own question.
Check engine light is on. it is error p0740 (torque converter clutch). what can i do? i need it to pass emissions...
How much should i expect to pay to have this item repaired. i was given a quote of two thousand!