OBD-II code · Powertrain (generic)
P0743 Torque Converter Clutch Circuit Electrical
An electrical fault in the torque converter clutch solenoid circuit — open, shorted, or out-of-range driver current. The transmission usually inhibits TCC apply when this code is active.
Is it safe to drive with P0743?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyTCC solenoid electrically failed
- PossibleWiring/connector fault
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
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1.5–10 h
- Emissions test
- Usually unaffected
- Parts involved
- Torque Converter Clutch Solenoid, Solenoid Wiring
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.