P0743 — Torque Converter Clutch Circuit Electrical

P0743: Torque Converter Clutch Circuit Electrical — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

Torque Converter Clutch Circuit Electrical. Basic catalogue definition; diagnostic details have not yet been reviewed.

Affected system: Powertrain

Symptoms

  • Jerky shifts; higher engine speed and increased consumption.

Possible causes

  • Faulty TCC solenoid, short circuit or damaged connections.

What to check

  • Electrically check TCC circuit and inspect wiring and connectors.

Also written as: P0743-00, P074300, PO743 (some scan tools add the fault-type byte, e.g. -00).