What P0740 means
Torque Converter Clutch Circuit Malfunction
Common causes (general)
Before spending money on parts, verify the code with a scan tool and read freeze frame data. Freeze frame captures every sensor value at the moment the code set — this is often enough to figure out the root cause without further testing.
Manufacturer-specific descriptions
Different manufacturers use this code for slightly different failure modes. Here's what your specific make means by P0740:
| BMW | Torque Converter Clutch Circuit/Open |
| FORD | Torque Converter Clutch Circuit Malfunction |
| HONDA | Problem in Lock-up Control System |
| MITSUBISHI | Torque Converter Clutch Circuit Malfuction; DCC solenoid |
| NISSAN | Torque Converter Clutch Circuit Malfuction |
| VOLKSWAGEN | TCC Enable Solenoid Circuit Electrical |
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