Brake Pedal Position Sensor Circuit Range/Performance Problem
The brake pedal position sensor is reporting a voltage out of range.
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What it means (plain English)
Your car has a sensor that tells the computer how far your foot is pressing the brake. If the sensor sends incorrect signals, the brake lights might not work right, affecting safety.
What the computer is actually seeing
The brake pedal position sensor sends a voltage signal to the computer. Normally, a fully released pedal sends about 0.5V to 0.8V and a fully pressed pedal sends around 4.5V to 5V. If it sees anything significantly different, like below 0.2V or above 4.8V, it triggers a fault code.
What a healthy reading looks like
0.5V to 5V, with specific ranges depending on pedal position being sensed (0V at fully released to around 5V at 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 for the brake pedal position sensor for damage or corrosion. Repair as necessary.
- 22. Check the brake fluid level and ensure it is within specifications. Top off if low.
- 33. Measure the voltage at the brake pedal position sensor with a multimeter. Key on, engine off, you should see 0.5V to 5V depending on pedal position.
- 44. If the voltage is out of range, replace the brake pedal position sensor and clear the fault code to see if it returns.
- 55. If the voltage is correct, check the engine control module for ground connections and possible faults.
Common causes
- Faulty brake pedal position sensor
- Corroded or damaged wiring/connector leading to the sensor
- Brake fluid level is low affecting brake booster performance
- Faulty engine control module or bad ground connection
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally moderate severity, but if the brake lights don’t work, driving could be dangerous.
Will this code come back after I fix it?
If you correctly fix the sensor or wiring issue, the code should not return.
Why do I see this code with other related codes?
These codes often appear together because multiple systems rely on the same sensor for braking performance.
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