OBD-II code guide
P0740 Torque Converter Clutch Circuit Malfunction
P0740 means the torque converter clutch control circuit or operation is not behaving as expected.
What it means
The automatic transmission may not be locking the torque converter properly.
Common symptoms
- Check engine light
- Transmission slipping feeling
- Higher highway RPM
- Poor fuel economy
- Shudder at cruising speed
Likely causes
- Torque converter clutch solenoid fault
- Dirty or low transmission fluid
- Wiring issue
- Valve body problem
- Torque converter wear
First checks
- Check for other transmission codes.
- Verify fluid level and condition using the correct method.
- Avoid long drives if slipping or overheating occurs.
- Use a transmission-capable scan tool.