What does code P0740 mean?

Q: What does code P0740 mean?

There's a problem in the torque converter clutch circuit. Safe to drive? Usually drivable gently, but get it checked. Overheating can follow.

P0740: Torque Converter Clutch Circuit Malfunction

Severity: medium

What it means: There's a problem in the torque converter clutch circuit.

Safe to drive? Usually drivable gently, but get it checked. Overheating can follow.

Common symptoms

Check-engine light
Harsh, slipping or delayed shifts
Possible limp mode (stuck in one gear)

Likely causes, ranked

Faulty torque converter clutch solenoidShop
Wiring faultDIY
Low fluid or a converter problemShop

What it means: There's a problem in the torque converter clutch circuit.

Severity: Medium. Safe to drive? Usually drivable gently, but get it checked. Overheating can follow.

DIY or shop?

Check the fluid level and condition if your transmission allows it. Diagnosis is usually a shop job.

Before you replace parts

Read all stored codes and freeze-frame data. Fix misfire, fuel or sensor codes before chasing emissions codes.
Check the simple things first: connectors, vacuum hoses, fluid levels and the gas cap.
Clear the code only after a repair, then confirm it stays off after a few drives.
Check your VIN for recalls and service bulletins.

Safety / mechanic note

Verify with a mechanic if you notice drivability changes, warning lights or overheating. A code points to a circuit or system, not always a specific part.