Brake Pedal Position Sensor Circuit
Indicates an issue with the brake pedal position sensor circuit.
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 sends a signal to the engine computer to tell it how much the pedal is pressed. When this sensor fails, the computer can't tell if the brakes are applied, which can affect systems like cruise control.
What the computer is actually seeing
The ECM (Engine Control Module) looks for a voltage from the brake pedal position sensor between 0.5V (pedal up) and 4.5V (pedal down). If the voltage is out of this range, or if it sees an open circuit, it sets the fault code.
What a healthy reading looks like
0.5V (no pressure) to 4.5V (full pressure) when measuring the sensor's output signal.
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.
- 1Check the brake pedal position sensor wiring for breaks or corrosion (look for damaged insulation).
- 2Inspect the connector for moisture or dirt, and ensure it's fully seated. Connectors should have a solid grip and minimal resistance. If damaged, repair or replace as needed.
- 3Using a multimeter, measure the voltage at the brake pedal position sensor signal wire (should be 0.5V to 4.5V when the pedal is pressed). Is the voltage within range? If yes, the sensor is likely good; if not, replace the sensor. Ensure the ground and power supply to the sensor are also good.
- 4If the sensor is functioning but the code persists, suspect the ECM. Use a scan tool to check for related codes or error messages to confirm.
Common causes
- Faulty brake pedal position sensor
- Wiring issues or corroded connections
- Bad grounds or electrical interference
- Faulty ECM readings
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's driveable but fix it soon as you might lose ABS or cruise control functionality.
Will this code come back if I clear it?
If the underlying issue isn't fixed, it will likely return after driving.
Does this code affect my braking power?
No, but it can disable safety features like cruise control and traction control.
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