P0742 Code: Torque Converter Clutch Circuit Stuck On
🟠 Moderate severity · drivable
You can drive, but the engine may stall when you come to a stop because the torque converter clutch stays locked.
What P0742 means
The torque converter clutch is staying locked when it shouldn't, often at low speeds or idle. The computer commands the clutch to release, but it stays engaged, which can make the engine stall when you stop. A stuck solenoid or a hydraulic problem inside the transmission is the usual cause.
Symptoms
- Check engine light is on
- Engine stalls when coming to a stop
- Engine lugs or shudders at low speed
- Rough idle
Common causes
- most common: Faulty torque converter clutch solenoid
- common: Valve body stuck or contaminated
- common: Wiring short keeping the solenoid powered
- less common: Worn torque converter clutch
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Check transmission fluid level and condition | Yes | $20–60 |
| Replace the torque converter clutch solenoid | Mechanic | $150–450 |
| Replace the torque converter if the clutch is worn | Mechanic | $800–2000 |
Frequently asked questions
Can I drive with a P0742 code?
Yes, but the engine may stall when you stop because the clutch stays locked. Have it repaired soon to avoid damage.
What does torque converter clutch stuck on mean?
It means the torque converter clutch stays locked even when it should release, such as at idle. That can stall the engine and strain the transmission.
How much does it cost to fix a P0742?
Replacing the TCC solenoid usually runs $150–$450. If the torque converter itself needs replacing, expect $800–$2,000.
Related codes
P0740
P0740 Code: Torque Converter Clutch Circuit Malfunction
P0744P0744 Code: Torque Converter Clutch Circuit Intermittent
P0741P0741 Code: Torque Converter Clutch Circuit Performance or Stuck Off
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.