Question 1

What does P0740 mean?

Accepted Answer

P0740 - Torque Converter Clutch (TCC) Circuit. Torque converter lockup clutch circuit has an electrical fault.

Question 2

What are the symptoms of P0740?

Accepted Answer

Check engine light, RPM flare at highway speed, Reduced fuel economy, Shudder at TCC apply, Stalling when stopping (TCC stuck on)

Question 3

What causes P0740?

Accepted Answer

Failed TCC solenoid, Wiring issue, Corroded connector, TCM driver failure

Question 4

How much does it cost to fix P0740?

Accepted Answer

Typical repair cost: $150-$1,500. If engine stalls when coming to a stop, TCC is stuck engaged — this is dangerous. Have it towed.

P0740 — Torque Converter Clutch (TCC) Circuit

Don't guess — diagnose P0740 the right way