OBD-II Generic Error Code P0703: How to Fix It

Q: Can I drive with error code P0703?

You can drive short distances, but it's not recommended for extended periods. P0703 can affect transmission shifting patterns, disable cruise control, and may prevent proper engine braking. Have it diagnosed and repaired promptly for safety and performance.

Q: How much does it cost to fix P0703?

If only the brake switch needs replacement, costs typically range from $50-150 for parts and labor. However, if wiring repair or PCM replacement is needed, costs can range from $200-800 or more depending on the specific issue and vehicle.

Q: Will P0703 cause my car to fail inspection?

Yes, P0703 will likely cause your vehicle to fail emissions or safety inspection in most areas. The error code indicates a malfunction in a safety-related system that inspectors check during the testing process.

Q: What other symptoms occur with P0703?

Common symptoms include cruise control not working, transmission not shifting properly (especially in automatic transmissions), brake lights not working correctly, and potentially rough idle or stalling when coming to a stop.

Q: How do I prevent P0703 from happening again?

Regular maintenance helps prevent P0703. Keep brake pedal area clean and free of debris, avoid spilling liquids near the brake switch, and have electrical connections inspected during routine service. Replace brake switches proactively if they show signs of wear.

Abstract

Error code P0703 indicates a problem with the brake switch B circuit in your vehicle's electronic control system. This error occurs when the powertrain control module (PCM) detects an abnormal signal from the brake pedal position switch, which can affect engine performance, transmission shifting, and cruise control operation.