Brake Pedal Position Sensor Circuit Range/Performance Problem
The brake pedal position sensor is giving a reading outside its expected range.
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 measures how far the brake pedal is pressed. If it sends a signal that's too high or too low, like 0.2 volts when it should be around 1-4 volts, the computer thinks something's wrong with the brake system.
What the computer is actually seeing
The brake pedal position sensor sends a voltage signal that should change smoothly between 0.5 to 4.5 volts depending on how far down the pedal is pressed. If it spikes, drops, or stays constant when it shouldn't, the code triggers.
What a healthy reading looks like
0.5 to 4.5 volts from the sensor; should vary as the pedal is 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.
- 11. Inspect wiring and connectors at the brake pedal position sensor for fraying, corrosion, or loose connections. Fix any issues found. Decision: If connections are good, proceed; if not, repair the wiring.
- 22. Check the brake pedal position sensor's output voltage with a multimeter while pressing the pedal slowly. It should vary smoothly from 0.5 to 4.5 volts. Decision: If the voltage is erratic, replace the sensor; if the voltage is consistent, proceed.
- 33. Verify the ground for the brake pedal position sensor. Check continuity from the sensor to the ground. Decision: If the ground is bad, repair it; if it's good, proceed.
- 44. Test the brake control module for any faults or codes unrelated to the brake pedal position sensor. Use a scan tool for this. Decision: If additional codes are found, address them; if none, consider replacing the brake pedal position sensor.
Common causes
- Faulty brake pedal position sensor
- Damaged wiring or connectors
- Bad brake pedal position sensor ground
- Faulty brake control module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to fix it soon because improper brake signals can affect braking performance.
Will this code come back after resetting it?
Yes, if the underlying problem isn't fixed, the code will likely return.
Why might this code pair with others?
Other codes could indicate problems in the brake system, like issues with the brake control module or other sensors.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →