P0744 — Torque Converter Clutch Circuit Intermittent

P0744: Torque Converter Clutch Circuit Intermittent — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

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

Affected system: Powertrain

Symptoms

  • Vibration while driving; erratic shifts and increased consumption.

Possible causes

  • Loose/corroded connectors, damaged wiring or faulty TCC solenoid.

What to check

  • Inspect TCC circuit and test solenoid operation and relevant sensors.

Also written as: P0744-00, P074400, PO744 (some scan tools add the fault-type byte, e.g. -00).