Brake Pedal Position Sensor Range/Performance Problem
The brake pedal position sensor isn't sending the correct data to the control module.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The brake pedal position sensor sends a signal that tells the computer how far the brake pedal is pressed. If the signal is too low or out of range, the system won't know if the brakes are applied or not.
What the computer is actually seeing
The computer expects a voltage signal from the brake pedal position sensor that varies between 0.5V (no pedal press) to 4.5V (fully pressed). If the signal is outside of this range or if it stays constant, the computer will flag a fault.
What a healthy reading looks like
Voltage should be between 0.5V to 4.5V when the pedal is pressed and released.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Inspect the wiring and connectors for damage, frays, or corrosion. Correct as needed. Decision: If wiring/connector is damaged, repair or replace.
- 22. Check the brake fluid level and the brake system for leaks. Ensure the system is operating correctly. Decision: If low fluid or leaks are found, address those issues first.
- 33. Using a multimeter, measure the voltage on the brake pedal position sensor. Compare the readings to expected values (0.5V-4.5V). Decision: If voltage is not in range, consider replacing the sensor.
- 44. Clear the fault code and perform a test drive to see if the code reappears. Decision: If the code returns, further investigation into the wiring or control module may be necessary.
Common causes
- Faulty brake pedal position sensor
- Wiring issues or connector problems
- Corroded terminals or poor ground connection
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's advisable to fix it soon; the brake system may not function properly, which can affect safety.
Will this code come back?
If the underlying issue isn't resolved—like a faulty sensor or bad wiring—the code likely will return.
Does this code relate to ABS functionality?
Yes, the brake pedal position sensor is crucial for systems like ABS to function correctly.
Working a real vehicle right now?
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