P0740
Torque Converter Clutch Circuit/Open
Powertrain · Generic (all makes)System: Transmission/Drivetrain + Electrical/Circuits
Fix within days. Damage or fuel waste builds up.
Likely causes
- Torque converter clutch solenoid
- Worn torque converter
- Low or burnt transmission fluid
What to check first
Check fluid level and condition first, then test the TCC solenoid.
Typical repair cost
$200 – $2,500
Independent-shop parts and labor for the usual fix. Your price depends on the actual cause and the vehicle.
Next step
General information, not a diagnosis of your vehicle. Repair costs are typical shop ranges, not quotes.