Torque Converter Clutch Circuit Stuck On
The torque converter clutch (TCC) cannot disengage. Symptom is engine stalling when coming to a stop, because the engine is mechanically locked to the transmission output.
Affected components
- Torque converter clutch solenoid
- Transmission valve body
Common causes
- High likelihood: TCC solenoid stuck on
- Medium likelihood: Valve body contaminated
- Low likelihood: Carbon or debris buildup preventing free movement
Possible symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Diagnostic notes
- The malfunction indicator lamp may illuminate
- Reduced-power or limp mode may occur
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.