Brake Pressure Sensor Out of Range - High
The brake pressure sensor is reporting a pressure level that exceeds the 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 brake pressure sensor measures how hard the brake pedal is pushed. If it reads more than 150 psi when it shouldn’t, the computer gets a warning.
What the computer is actually seeing
The ECU expects brake pressure readings between 0-150 psi. If it sees values greater than 150 psi, it triggers a fault.
What a healthy reading looks like
Normal brake pressure should be between 0-150 psi during operation, with under 10 psi at rest.
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 connector on the brake pressure sensor for damage and poor connections. Repair if necessary. Decision: Are connections solid?
- 22. Verify brake fluid level in the master cylinder. It should be between the 'MIN' and 'MAX' marks. Decision: Is fluid level adequate?
- 33. Use a scan tool to read the actual brake pressure data and compare with the expected values. Decision: Is the reading over 150 psi?
- 44. Test the brake pressure sensor with a multimeter. It should output a voltage consistent with pressure (e.g., 0.5V at 0 psi and near 4.5V at 150 psi). Decision: Is the voltage output correct?
- 55. If all previous tests are passed but the code remains, replace the brake pressure sensor.
Common causes
- Faulty brake pressure sensor
- Shorted or corroded wiring in the brake pressure sensor circuit
- Brake fluid leaks causing erroneous readings
- Faulty brake master cylinder
- Air in the brake lines
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended, as braking performance could be compromised.
Will this fault code come back after clearing it?
If the underlying cause isn't addressed, it likely will return.
Why does this code pair with SPN 1111?
Both codes relate to issues in the brake pressure 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.
Start guided diagnostic →