p0703 brake switch performance
P0703 Brake Switch Performance
- OBD2 Code: P0703
- Description: Brake Switch Performance
- Definition: This code indicates a problem with the brake switch circuit, which is responsible for sending signals to the vehicle’s computer regarding the status of the brake pedal. The issue could be due to a malfunctioning brake switch or related wiring problems.
p0703 – Brake Switch Performance
Typical Severity: Moderate
Common Causes
p0703 – Brake Switch Performance
Common causes of this OBD2 code include:
- Faulty brake light switch
- Misadjusted brake light switch
- Short circuit in the wiring related to the brake light switch
- Open circuit in the wiring related to the brake light switch
Common Misdiagnosis
OBD2 Code: P0703
Description: Brake Switch Performance
Common Misdiagnosis: Replacing the brake switch without checking for wiring issues or blown fuses.
Common Diagnostic Steps
OBD2 Code: P0703
Description: Brake Switch Performance
- Check the brake switch for proper operation and adjustment.
- Inspect the brake switch wiring and connectors for damage or corrosion.
- Test the voltage at the brake switch to ensure it is receiving power.
- Verify that the brake lights are functioning correctly when the pedal is pressed.
- Use a scan tool to monitor live data from the brake switch circuit while pressing and releasing the pedal.
- If equipped, check for any related transmission control module (TCM) codes that may indicate further issues.
- Replace or repair any faulty components as necessary based on diagnostic findings.