Brake Pedal Position Sensor 1 Circuit High
The brake pedal position sensor signal is too high.
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What it means (plain English)
The sensor that detects how far you're pressing the brake pedal is sending a voltage signal that's higher than it should be, which can cause issues with cruise control and braking systems.
What the computer is actually seeing
The brake pedal position sensor usually sends a voltage between 0.5V and 4.5V corresponding to the brake position. In this case, it's seeing a voltage above 4.5V.
What a healthy reading looks like
Expected voltage from brake pedal position sensor is 0.5V (not pressed) to 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.
- 11. Inspect the wiring and connector to the brake pedal position sensor for any damage or corrosion.
- 22. Measure the voltage at the brake pedal position sensor with the ignition on. It should read between 0.5V and 4.5V. If it’s above this, go to step 3.
- 33. Check for short circuits in the wiring. Disconnect the sensor and measure continuity between the signal wire and ground. If there's continuity, repair the short.
- 44. If the wiring checks out, replace the brake pedal position sensor and retest.
Common causes
- Faulty brake pedal position sensor
- Shorted wiring or connectors
- Corrosion in the electrical connectors
- Faulty ECM (Engine Control Module)
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended to drive as it can affect your braking and cruise control performance.
Will this code come back after clearing?
If the cause isn't fixed, yes, the code will likely return.
Why does this code relate to cruise control issues?
The brake pedal position sensor is essential for the cruise control system to deactivate when you brake.
Working a real vehicle right now?
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