Brake Pedal Position Sensor Fault
There’s a problem with the brake pedal position sensor signal.
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 tells the vehicle’s computer how far down the brake pedal is pressed. It works by sending a voltage signal that changes as you press the pedal. Normally, when the pedal is not pressed, it should show around 0.2 volts, and when fully pressed, it should be close to 4.5 volts.
What the computer is actually seeing
The ECU expects a specific voltage range from the brake pedal position sensor as you press the brake pedal. If the voltage is too low (usually below 0.3V) or too high (usually above 4.6V), the ECU will recognize this discrepancy and set the fault code.
What a healthy reading looks like
Brake pedal position sensor should show between 0.2V (not pressed) and 4.5V (fully pressed).
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.
- 1Inspect the wiring and connectors to the brake pedal position sensor for damage or corrosion.
- 2Use a multimeter to check the voltage from the brake pedal position sensor. Should read 0.2V (not pressed) to 4.5V (fully pressed).
- 3If the voltage is out of range, replace the brake pedal position sensor and retest.
- 4If the sensor is within range, check the brake light switch and its wiring for faults.
- 5Clear the codes and test drive the vehicle to see if the fault reappears.
Common causes
- Damaged brake pedal position sensor
- Wiring issues or bad connectors
- Faulty brake light switch
- Incorrect calibration of the sensor
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code present?
Yes, but braking performance may be affected. Fix it soon to avoid issues.
Will this code come back after resetting it?
If the underlying problem isn’t fixed, yes, it’ll return.
Why does this code sometimes pair with transmission issues?
Transmission controls often rely on brake pedal position; a fault can affect shifting.
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