TransmissionSeverity Medium: diagnose soon

P0743Torque Converter Clutch Solenoid Circuit Electrical

What it means

The transmission control sees an electrical problem in the torque converter clutch solenoid circuit (short, open or wrong current).

Symptoms

Harsh, late or missing shifts
Transmission stuck in one gear (limp mode)
Check engine or gearbox warning light

Common causes

Shorted or open solenoid winding
Harness or connector fault
Control module fault

What to check first

Measure solenoid resistance and insulation to ground
Check the harness and connector pins
Check for other solenoid codes pointing to a common supply

Can I drive with P0743? Usually yes for a short distance, but performance or economy may suffer and the fault can get worse. Diagnose it soon.

Generic OBD-II meaning. Manufacturer-specific meanings and checks can differ; always check the service information for the car.

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P0743: questions and answers

What does P0743 mean?

P0743: Torque Converter Clutch Solenoid Circuit Electrical. The transmission control sees an electrical problem in the torque converter clutch solenoid circuit (short, open or wrong current).

What are the symptoms of P0743?

Harsh, late or missing shifts. Transmission stuck in one gear (limp mode). Check engine or gearbox warning light.

What causes P0743?

Shorted or open solenoid winding. Harness or connector fault. Control module fault.

How do you diagnose P0743?

1. Measure solenoid resistance and insulation to ground 2. Check the harness and connector pins 3. Check for other solenoid codes pointing to a common supply

Can I drive with P0743?

Usually yes for a short distance, but performance or economy may suffer and the fault can get worse. Diagnose it soon.