Brake Pedal Position Sensor Circuit Range/Performance Problem
The brake pedal position sensor is giving readings outside the 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)
Your vehicle's computer is getting wrong information from the brake pedal sensor, which tells the system how hard you're pressing the brake.
What the computer is actually seeing
The brake pedal position sensor should give a voltage signal that changes when you press the pedal, typically between 0.5V (not pressed) and 4.5V (fully pressed).
What a healthy reading looks like
Brake pedal position should show about 0.5V at rest and 4.5V at full brake application.
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 battery voltage; should be 12.6V or higher. If not, charge or replace the battery.
- 22. Inspect the brake pedal position sensor wiring and connectors for corrosion or damage. Repair any issues found.
- 33. Use a scan tool to monitor the brake pedal position voltage. Check if it jumps between 0.5V and 4.5V as you press the pedal.
- 44. If voltage is steady but outside the expected range, replace the brake pedal position sensor.
- 55. After replacement, clear codes and perform a brake system function test to verify the fix.
Common causes
- Bad brake pedal position sensor
- Corroded or damaged wiring or connectors
- Faulty brake module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It’s moderate severity; the vehicle may have limited braking features, so it's best to fix soon.
Will this problem come back after fixing?
If the root cause is addressed, such as wiring or sensor issues, it should not return.
Why does this code sometimes pair with C1009 or C1010?
Those codes are related to the brake system and can indicate issues with the brake pedal or its circuit.
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 →