Brake Pedal Position Sensor 2 Low
The secondary brake pedal position sensor is reading lower than expected.
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)
There are two brake pedal position sensors in the system to ensure safety. If one reads lower than it should, the computer thinks there's an issue with the brakes, which could affect how well they work.
What the computer is actually seeing
The brake control module checks the signal voltage from Brake Pedal Position Sensor 2 (BPPS2). A normal reading should be between 0.5V to 4.5V depending on how far the pedal is pressed. If it drops below 0.5V, it triggers this fault.
What a healthy reading looks like
Expected voltage output from BPPS2 should be between 0.5V (pedal not pressed) and 4.5V (pedal fully depressed).
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 wiring and connectors to the brake pedal position sensor 2 for damage or corrosion. Repair as needed.
- 22. Verify the voltage output from the brake pedal position sensor 2 with a multimeter. A reading below 0.5V indicates a fault. Proceed to step 3 if it's low.
- 33. Inspect for continuity in the wiring from the sensor to the brake control module. Perform repairs or replacements based on your findings. If continuity is good, move to step 4.
- 44. Replace the brake pedal position sensor 2 if the voltage remains low after checking wiring and connections. Test drive to confirm the issue is resolved.
Common causes
- Faulty brake pedal position sensor 2
- Wiring issue to the sensor (damaged, corroded)
- Faulty brake control module
- Incorrect installation or calibration of the sensor
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this fault code?
It’s best to fix this issue soon, as it can affect braking performance.
Will this code come back after clearing?
If the underlying issue isn't fixed, yes, it will likely return.
Why might this code appear alongside other SPNs?
Multiple brake sensor codes indicate a systemic issue, often related to wiring or the brake control module.
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 →