Torque Converter Clutch Circuit Malfunction
A general fault has been detected in the torque converter clutch (TCC) lockup circuit. The TCC mechanically links the engine to the transmission input shaft above a certain speed to eliminate slip and improve fuel economy.
Affected components
- Torque converter
- Tcc solenoid
- Transmission fluid
Common causes
- High likelihood: TCC solenoid failed
- Medium likelihood: Transmission fluid low or burnt
- Low likelihood: Wiring fault to solenoid
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
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.