What does code P0703 mean?
A malfunction is detected in brake switch B or torque converter clutch input circuit.
OBD-II Code
P0703 — Torque Converter/Brake Switch B Circuit Malfunction
A malfunction is detected in brake switch B or torque converter clutch input circuit.
Common symptoms
- Vibration when braking
- harsh transmission behavior
Possible causes
- Faulty brake switch
- contaminated contacts
- wiring issues
Initial recommendation
Inspect brake switch operation and torque converter clutch input signals.
Safety notice
This information is for guidance only and does not replace a physical vehicle inspection or diagnosis by a qualified mechanic. If the vehicle has severe power loss, smoke, a fuel odor, overheating, brake or steering problems, or any unsafe behavior, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
Use the app to combine code P0703 with your vehicle's actual symptoms for more complete diagnostic guidance.
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