What usually causes it
- A failed lockup solenoid
- A damaged wire or a loose plug
- Low or dirty transmission fluid
- A worn torque converter
P0740Starts at: Get it checked this week
Torque converter clutch circuit problem
The torque converter links the engine to an automatic transmission, and its clutch locks at cruising speed to save fuel. The computer found an electrical problem with the control of that clutch.
What to watch for
- A shudder or vibration at steady speed, often around 40 to 60 mph
- The engine revving higher than normal on the highway
- Poor gas mileage or a burning smell
Can I keep driving?
We rate P0740 as Get it checked this week. It is not an emergency yet, but it can get worse. If the light starts flashing, stop driving soon.
Quick answers about P0740
What does P0740 mean?
Torque converter clutch circuit problem. The torque converter links the engine to an automatic transmission, and its clutch locks at cruising speed to save fuel. The computer found an electrical problem with the control of that clutch.
Can I keep driving with P0740?
We rate P0740 as Get it checked this week. It is not an emergency yet, but it can get worse. If the light starts flashing, stop driving soon.
What usually causes P0740?
The most common causes, in order: A failed lockup solenoid; A damaged wire or a loose plug; Low or dirty transmission fluid; A worn torque converter.
Estimates only. A mechanic should confirm. The same code can mean slightly different things on different cars; the app explains it for your exact year, make, model and mileage.