Brake Pedal Position Sensor Failure
The brake pedal position sensor is malfunctioning or not responding.
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 down you press the brake pedal. If it stops working, the computer can't tell if you're braking, which can affect things like the cruise control or stability control systems.
What the computer is actually seeing
The vehicle's onboard computer expects the brake pedal position sensor to provide a voltage signal that corresponds to the pedal position. A typical signal should range from 0.5V (fully released) to 4.5V (fully depressed).
What a healthy reading looks like
Brake pedal position sensor voltage should vary from 0.5V to 4.5V during operation.
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 damage or corrosion. If found, repair as needed. Decision: If no issues, move to next step.
- 22. Measure the voltage at the brake pedal position sensor connector while pressing the brake pedal. Compare readings to expected values (0.5V to 4.5V). Decision: If readings are out of range, replace the sensor. If readings are normal, check the ECU input.
- 33. Check for any related trouble codes with a scanner that could indicate further issues (e.g., C1167, C1169). Decision: If other codes are present, investigate them accordingly.
Common causes
- Faulty brake pedal position sensor
- Damaged wiring or connectors
- ECU software issue
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Moderate severity indicates you should fix this soon, but it may still drive; however, features relying on brake input, like cruise control, may not function properly.
Will this code come back after clearing it?
If the underlying issue isn't resolved, such as a faulty sensor or wiring problem, the code is likely to return.
Why does this code sometimes appear with others?
Multiple codes can indicate related sensor or system failures, like issues with stability control when the brake system is affected.
Working a real vehicle right now?
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