Brake Pressure Sensor Circuit Fault
There's a problem with the brake pressure sensor signal.
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 pressure sensor measures the force applied to the brakes. If the sensor is faulty or there's an issue with its wiring, the computer doesn't know how hard the brakes are being applied, which can affect braking performance.
What the computer is actually seeing
The computer expects a variable voltage signal from the brake pressure sensor, typically between 0.5V and 4.5V. If the signal is outside this range or there's no signal at all, it triggers the fault code.
What a healthy reading looks like
Normal brake pressure sensor voltage during operation: between approximately 0.5V (no pressure) and 4.5V (maximum pressure).
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 for the brake pressure sensor for damage or corrosion. Discontinue if found defective.
- 22. Measure the voltage at the brake pressure sensor connector with the key on (engine off). Expect a range of 0.5V to 4.5V. If out of range, replace the sensor.
- 33. If voltage is within range, check for shorts to ground using a multimeter. Repair any shorts found.
- 44. Perform a continuity test of the sensor wiring back to the brake control module. Repair any breaks in wiring.
- 55. If all checks are normal and the fault persists, replace the brake pressure sensor.
Common causes
- Faulty brake pressure sensor
- Poor wiring or connectors
- Corrosion or damage to electrical connections
- Fluid leaks affecting pressure
- Faulty brake control module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended, as brake performance could be affected.
Will this code come back after erasing it?
If the underlying issue isn't fixed, yes, the code will likely return.
Does this code pair with any other codes?
Yes, it often appears with codes related to brake control issues.
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