Brake Pressure Sensor Circuit Range/Performance Problem
Indicates a problem with the brake pressure sensor readings.
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What it means (plain English)
The brake pressure sensor monitors the brake fluid pressure in your system; if it reports values outside of expected ranges, it triggers this code.
What the computer is actually seeing
The ABS controller compares the voltage from the brake pressure sensor; if it is below 0.5V or above 4.5V or if the readings are inconsistent during braking, this code is set.
What a healthy reading looks like
Brake pressure should range from 0.1V to 4.9V under normal circumstances, with specific thresholds varying based on application.
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 brake fluid level; ensure it's above the minimum mark. Decision Point: If low, top up and retest. If okay, proceed to step 2.
- 22. Visually inspect wiring and connectors related to the brake pressure sensor; look for frays or corrosion. Decision Point: If damaged, repair the wiring/connectors and retest. If okay, proceed to step 3.
- 33. Check the voltage output of the brake pressure sensor with a multimeter; it should output between 0.1V to 4.9V when pressure is applied and released. Decision Point: If out of range, replace the sensor. If within range under pressure, proceed to step 4.
- 44. Connect a scan tool and check for other related codes; if this code is the only one present, replace the brake pressure sensor. If additional codes are present, diagnose them as needed.
Common causes
- Faulty brake pressure sensor
- Damaged wiring or connectors to the sensor
- Low brake fluid level or leaks in the brake system
- Faulty ABS control module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to fix this issue soon as it affects brake performance, which is critical for safety.
Will the code come back after repairs?
If the repair is done properly, the code should clear and not reappear.
Why does this code pair with others?
It can be related to other issues in the brake system, typically linked to sensors or fluid levels.
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