OBD
P0742
Torque Converter Clutch Circuit Stuck On
What it means
P0742 means Torque Converter Clutch Circuit Stuck On.
Check these first
- TCC lockup staying engaged mechanically
- Shorted TCC solenoid circuit
- Stuck valve body or contaminated fluid debris
- Failing torque converter clutch
- TCM fault
What to do next
- Monitor TCC commanded and actual states on an OBD-II scanner
- Check transmission fluid for debris or contamination
- Test the TCC solenoid operation
- Inspect the valve body for sticking parts
- Replace the torque converter if the clutch will not release
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Updated
Generic SAE J2012 definition. Last updated 2026-08-30.