P0740Medium urgency
Torque Converter Clutch Circuit Malfunction
Transmission · Torque Converter
⚠️ Fuel economy suffers at highway speeds. Service within 1–2 weeks.
What this means
The torque converter clutch (TCC) circuit has a fault. The TCC locks the transmission input shaft to the engine for highway cruising efficiency, and its failure causes poor fuel economy.
Likely causes
- Failed TCC solenoidMost common
- TCC solenoid wiring faultCommon
- Failed torque converterCommon
Estimated repair cost
TCC solenoid$100 – $300
Transmission fluid service$100 – $250
Torque converter$300 – $800
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Frequently asked questions about P0740
What does P0740 mean?
The torque converter clutch (TCC) circuit has a fault. The TCC locks the transmission input shaft to the engine for highway cruising efficiency, and its failure causes poor fuel economy.
Is P0740 serious?
Fuel economy suffers at highway speeds. Service within 1–2 weeks.
How much does it cost to fix P0740?
Repair costs for P0740 range from $100 – $300 depending on the root cause and your vehicle.
Can I drive with P0740?
You can drive short distances but should have it repaired within 1–2 weeks to prevent further damage.