P0743Medium urgency

Torque Converter Clutch Circuit Electrical

Transmission · Torque Converter

⚠️ TCC cannot lock — poor highway fuel economy. Service within 1–2 weeks.

What this means

An electrical fault (open or short) in the torque converter clutch solenoid circuit. The ECU cannot control TCC engagement.

Likely causes

Estimated repair cost

TCC solenoid$100 – $300

Wiring repair$80 – $250

Frequently asked questions about P0743

An electrical fault (open or short) in the torque converter clutch solenoid circuit. The ECU cannot control TCC engagement.

TCC cannot lock — poor highway fuel economy. Service within 1–2 weeks.

Repair costs for P0743 range from $100 – $300 depending on the root cause and your vehicle.

You can drive short distances but should have it repaired within 1–2 weeks to prevent further damage.