P0740 Honda Accord
Torque Converter Clutch Circuit Malfunction · Powertrain Code · High
What is P0740?
The torque converter clutch (TCC) solenoid circuit has an electrical fault.
When the Honda Accord triggers code P0740 (torque converter clutch circuit malfunction), it typically points to an issue in the powertrain system. This is a high severity code, so address it promptly to avoid further damage or safety concerns. Below you'll find the most common causes, symptoms, and repair options specific to the Honda Accord.
Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your Honda Accord.
Common Causes on Honda Accord
- Failed torque converter clutch (TCC) solenoid
- Worn torque converter clutch friction material
- Contaminated or degraded transmission fluid (not using Honda DW-1)
- Wiring fault to TCC solenoid
Symptoms
- Check Engine Light on with D light flashing
- Shudder or vibration at highway speed (TCC engagement zone)
- Slight RPM flare when TCC should lock up
- Decreased fuel economy at highway speed
- Transmission may not lock up at all
Notes for Honda Accord
Honda automatics are very sensitive to fluid type — ONLY use Honda DW-1 ATF; aftermarket "compatible" fluids are the number one cause of Honda TCC shudder and codes.