Rear Brake Pedal Position Sensor Circuit Range/Performance Problem
The brake pedal position sensor is reporting values outside expected range.
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What it means (plain English)
The sensor that tells the computer how far down the brake pedal is pressed isn't sending correct signals, which can affect brake operation.
What the computer is actually seeing
The computer expects certain voltage ranges from the brake pedal position sensor, usually between 0.5V when not pressed to 4.5V when fully pressed. If it sees a voltage outside 0.2-4.8V, it throws a code.
What a healthy reading looks like
Brake pedal position sensor output voltage should be between 0.5V and 4.5V while pressing the pedal.
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. Check the brake pedal position sensor wiring for any visible damage or corrosion. Repair if necessary.
- 22. Inspect the connector for the brake pedal position sensor. Look for loose connections or corrosion. Clean or replace if needed.
- 33. Use a multimeter to measure the voltage at the brake pedal position sensor: it should read between 0.5V to 4.5V based on pedal position.
- 44. If the voltage readings are out of range, replace the brake pedal position sensor and clear the fault code.
- 55. If the sensor is working correctly but the code persists, check for other electronic faults in the brake system.
Common causes
- Faulty brake pedal position sensor
- Wiring or connector issues
- Corroded terminals
- Brake fluid level low affecting sensor operation
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable, but braking performance could be compromised. Fix soon.
Will this code come back after clearing it?
If the underlying issue isn't resolved, yes, the code will return.
Why does this code sometimes pair with ABS codes?
The brake pedal position sensor also influences system performance, so faults can affect ABS operation.
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