P0703
Torque Converter/Brake Switch B Circuit Malfunction
Generic code
Transmission System
High severity
Moderate repair
Free on OBD DashX
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What P0703 means
- The fault code P0703 indicates that there is an issue with the brake switch circuit. This may cause various problems with the vehicle's brake system, including the inability to shift out of park or the brake lights remaining on while driving.
Possible symptoms
- Inability to shift out of park
- Brake lights remaining on while driving
- Illuminated check engine light
- Reduced brake performance
Possible causes
- Faulty brake switch
- Loose or corroded electrical connections in the circuit
- Failed transmission control module (TCM)
- Failed engine control module (ECM)
Related parts
- Brake Switch Circuit: Brake switch is responsible for engaging and disengaging the brakes on the tires when brakes are applied. Problems lead to inefficient braking
Possible solutions
- Replace the faulty brake switch
- Check and repair any damaged wiring or connections
- Tighten or clean any loose or corroded electrical connections
- Replace the transmission control module (TCM) or engine control module (ECM) if necessary
Free on OBD DashX
P0703 on OBD DashX
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