Powertrain
generic / SAE
P0742
Torque Converter Clutch Circuit Stuck On
The torque converter clutch (TCC) cannot disengage. Symptom is engine stalling when coming to a stop, because the engine is mechanically locked to the transmission output.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number7 / 42
Possible causes
- TCC solenoid stuck on high
- Valve body contaminated medium
- Carbon or debris buildup preventing free movement low
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 200–2500 €
- Estimated time: 1.5–10 h
- Component: torque converter clutch solenoid
- Component: transmission valve body
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012