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
Symptoms
- Slight increase in engine RPM at freeway speeds
Common Problems
- Faulty Torque Converter Clutch solenoid
- Failed Torque Converter or damaged seal
Related Questions
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Check engine light is on. it is error p0740 (torque converter clutch). what can i do? i need it to pass emissions...
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