Brake Pedal Position Sensor Input Circuit
The brake pedal position sensor is malfunctioning or out of 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)
The brake pedal position sensor tracks how far you press the brake and sends that info to the engine control module to adjust engine functions, but it's not working right.
What the computer is actually seeing
The computer expects a voltage between 0.5 to 4.5 volts. If it's below 0.5V or above 4.5V, or not responding, it triggers the fault code.
What a healthy reading looks like
0.5V to 4.5V when the brake pedal is pressed; the signal should change smoothly with brake pedal movement.
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 connectors related to the brake pedal position sensor for damage or corrosion. Repair as necessary. Decision: Is the wiring intact? Yes: Go to step 2. No: Repair wiring/connectors and retest.
Common causes
- Faulty brake pedal position sensor
- Wiring issues or short circuits
- Corroded or damaged connectors
- Faulty engine control module (ECM)
- Mechanical binding of the brake pedal assembly
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Drivability may be affected since brake functions are linked; avoid driving until repaired.
Will this code come back after I fix it?
If the underlying problem is corrected and the sensor is replaced, it should clear; however, monitor closely.
Why does this code relate to the brake system?
The brake pedal position sensor directly impacts engine control for safety and performance; issues here can lead to reduced brake effectiveness.
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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