OBD-II diagnostic trouble code
P0743Caution
Torque Converter Clutch Circuit Electrical
An electrical fault in the torque converter clutch circuit distinct from a performance issue — usually wiring or the solenoid itself.
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Code names are compiled from open/standardized SAE and ISO references. Explanations, symptoms, causes and fixes are original. Covers generic (P0/C0/B0/U0) codes only — manufacturer-specific codes are planned for a future update.
Frequently asked questions
Can I drive with P0743?
You can usually keep driving with P0743, but don't put it off — the underlying cause can get worse or lead to further damage the longer it goes unaddressed. Get it diagnosed as soon as you reasonably can.
How much does it cost to fix P0743?
The cost varies too much by cause and vehicle to give a single figure here — a diagnosis will narrow it down.
What causes P0743?
Reviewed by Artyom SemenovAutomotive Editor · Fact-checked by Yauheni Kapliarchuk, Editor-in-Chief