Brake Pedal Position Sensor 1 Fault
The brake pedal position sensor signal is out of range or has a malfunction.
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 detects how far you push the brake pedal. If this signal is bad, the computer might think you're not braking when you actually are, or vice versa, causing issues with brake control or safety features.
What the computer is actually seeing
The computer monitors the voltage signal from the brake pedal position sensor, which should range from 0.5 to 4.5 volts. If the voltage is too low or too high, this code is triggered.
What a healthy reading looks like
Brake pedal position voltage should be between 0.5V (pedal up) and 4.5V (pedal 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.
- 11. Check the wiring and connectors at the brake pedal position sensor for damage, corrosion, or loose connections. Fix as needed. Decision: If wiring is good, proceed to step 2.
- 22. Using a multimeter, measure the voltage at the brake pedal position sensor. It should range between 0.5V and 4.5V while operating the pedal. Decision: If voltages are outside this range, replace the sensor. If within range, proceed to step 3.
- 33. Verify the brake control module for faults or updates. Use a scan tool to check for additional codes or communication issues. Decision: If other codes are present, address them. If not, testing may be required on the control module.
Common causes
- Faulty brake pedal position sensor
- Wiring issues or connector corrosion
- Failed brake control module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this fault code?
While the vehicle may still operate, braking performance can be compromised, so fix it as soon as possible.
Will this code come back after clearing it?
If the underlying issue isn't fixed, the code will likely return after clearing.
Could this be related to my ABS system?
Yes, the brake pedal sensor often interacts with ABS systems, affecting their function.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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