Brake Pressure Sensor Circuit / Above Normal
Indicates brake pressure sensor voltage is too high.
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What it means (plain English)
The brake pressure sensor measures the hydraulic pressure in the brake system and sends a voltage signal. If this voltage goes over a specified limit, the system recognizes a problem.
What the computer is actually seeing
The ECM monitors the brake pressure sensor's voltage output. A value above 4.5 volts typically indicates excessive brake pressure or a sensor fault.
What a healthy reading looks like
Normal operating voltage from the brake pressure sensor should be between 0.5 and 4.5 volts, depending on the brake pressure applied.
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 wiring and connectors to the brake pressure sensor for damage or corrosion. Repair as necessary.
- 2Measure the voltage at the brake pressure sensor with the ignition on. Expect 0.5 to 4.5 volts when no pressure is applied.
- 3If the voltage is above 4.5 volts, inspect for external pressure in the brake system or a short circuit.
- 4Perform a brake system pressure test to ensure it does not exceed normal specifications (typically 2000 psi, depending on vehicle).
- 5If all checks are normal, replace the brake pressure sensor.
Common causes
- Faulty brake pressure sensor
- Short circuit in wiring harness
- Wiring issues with connector
- External pressure applied to brake system without release
- ECM fault
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not safe; braking performance could be affected. Address it immediately.
Will this code come back after clearing?
Yes, if the issue persists, the code will return.
Why might this code trigger alongside others?
Multiple codes can indicate a broader issue in the brake system or wiring faults.
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