Brake Pressure Sensor Circuit Failure
The brake pressure sensor signal is out of expected range.
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 sensor that measures the brake fluid pressure isn't giving the right signals, which could mean it's faulty or there's a wiring issue.
What the computer is actually seeing
The engine control module (ECM) expects to see a voltage signal between 0.5 to 4.5 volts from the brake pressure sensor, depending on the fluid pressure. If the signal is higher than 4.5 volts or lower than 0.5 volts, or if it's erratic, the ECM registers a fault.
What a healthy reading looks like
Expected voltage signal from brake pressure sensor should be between 0.5 volts (no pressure) to 4.5 volts (full 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.
- 1Check brake fluid level; if low, top off and see if code returns.
- 2Inspect wiring and connectors for damage or corrosion; repair if needed.
- 3Using a multimeter, measure the brake pressure sensor output voltage. It should be between 0.5V and 4.5V while someone presses the brake pedal.
- 4If voltage is out of range, replace the brake pressure sensor and retest.
Common causes
- Faulty brake pressure sensor
- Wiring or connector issues
- Fluid leaks affecting pressure
- ECM software issues
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's safe to drive temporarily, but fix it soon as it affects braking performance.
Will this code come back after clearing?
If the underlying issue isn't fixed, the code will likely return.
Why is this code paired with other brake codes?
Multiple brake codes can indicate that the problem is related to the overall brake system.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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