Engine Error
P0743
Torque Converter Clutch Circuit Electrical
Severity
Medium
Symptoms
Limp mode, check engine light, no torque converter lockup
Common Causes
- Open or short in TCC solenoid circuit
- Failed TCC solenoid
- Corroded transmission connector
- TCM failure
How to Fix
- 1 Test wiring harness for continuity
- 2 Replace TCC solenoid
- 3 Clean and seat transmission main connector
- 4 Test TCM output
Estimated Repair Cost
USD
$100
–
$500
Wiring repair: $100 - $200; Solenoid replacement: $250 - $500