P0743 - Torque Converter Clutch Circuit Electrical

The transmission detected an electrical fault in the torque converter clutch circuit.

Code Overview

The transmission detected an electrical fault in the torque converter clutch circuit.

Common Causes

• Transmission sensor, solenoid, or switch fault
• Damaged wiring or connector
• Internal transmission or control-module issue

Diagnostic Steps

1. Check transmission fluid condition and supporting codes
2. Inspect the related connector and harness
3. Compare commanded operation to live scan data if supported

Likely Repairs & Cost Guides

Use test results to confirm the fault before pricing the repair.

Related OBD Codes

Browse the closest code-family pages when the same fault pattern often shows up nearby.

Next Steps

Move from the code to a diagnosis path, then into repair pricing once the fault is confirmed.