Brake Pedal Position Sensor Circuit Range/Performance Problem
The Brake Pedal Position Sensor is providing incorrect input to the engine control unit.
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 sensor that tells the computer how far you're pressing the brake pedal is malfunctioning, which can affect braking performance.
What the computer is actually seeing
The computer monitors the brake pedal sensor voltage and expects it to vary between 0.5 volts (brake released) and 4.5 volts (brake fully applied).
What a healthy reading looks like
0.5V (released) to 4.5V (fully applied), with expected linear progression in between.
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 brake fluid level and condition. If low, fill it and retest.
- 22. Check the wiring and connectors of the brake pedal position sensor for any visible damage or corrosion. Repair as necessary.
- 33. Use a multimeter to measure voltage at the brake pedal position sensor. Confirm it varies from 0.5V to 4.5V when operating the brake pedal.
- 4 - If voltage does not change, replace the brake pedal position sensor.
- 5 - If voltage is within range, check the engine control unit for faults.
Common causes
- Faulty brake pedal position sensor
- Wiring issues or shorts in the connector
- Corrosion or dirt on the sensor contacts
- Brake fluid contamination affecting sensor operation
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, but braking efficiency may be compromised. Fix it soon.
Will this code come back after clearing?
It may return if the underlying issue isn't resolved, particularly if the sensor is faulty.
Why does this code sometimes pair with other codes?
Multiple codes may point to issues in the brake system or related components, as they share inputs to the ECU.
Working a real vehicle right now?
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