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P0743 fault code: what it means

P0743: Damper clutch (torque converter lock-up) solenoid circuit electrical fault.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

  1. faulty damper clutch solenoid
  2. wiring or connector fault at the transmission
  3. TCM fault

P0743 by make

Hyundai

Damper clutch (torque converter lock-up) solenoid circuit electrical fault.

Usual causes: faulty damper clutch solenoid; wiring or connector fault at the transmission; TCM fault

Kia

Torque converter clutch circuit fault. On Cerato/Forte A6 autos often comes with valve body bore wear.

Usual causes: faulty torque converter clutch solenoid; valve body bore wear (A6GF1 / A6MF2); wiring or connector fault; low or old fluid

Land Rover

Torque converter clutch solenoid circuit. On older Discovery/Range Rover autos it brings the flashing M and S lights and limp mode.

Usual causes: gearbox wiring loom or connector fault; faulty TCC solenoid / valve body; low battery voltage

Suzuki

Torque converter clutch solenoid circuit (Aisin auto).

Usual causes: faulty TCC solenoid; solenoid wiring or connector; TCM

What the repair usually costs

Not sure what P0743 means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.