Brake Pressure Sensor Circuit Range/Performance Problem
The brake pressure sensor is not providing the correct input to the control module.
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)
Inside the brake system, there's a pressure sensor that checks how hard you're pressing the brakes. When it doesn't send the right pressure values, that could mean there’s a problem with the sensor or the circuit.
What the computer is actually seeing
The electronic control unit (ECU) expects the brake pressure sensor to send a voltage signal between 0.5V (no pressure) and around 4.5V (full pressure). If it reads either below 0.5V or above 4.5V consistently, it throws this code.
What a healthy reading looks like
Expected brake pressure sensor voltage is 0.5V (no pressure) to 4.5V (maximum pressure) while the brakes are being 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.
- 11. Check the brake fluid level; ensure it is within the specified range. If low, top off and retest engine system for codes.
- 22. Inspect wiring and connectors to the brake pressure sensor for damage or corrosion. Repair as needed and retest.
- 33. Use a multimeter to measure the voltage from the brake pressure sensor while applying the brakes. Ensure it varies smoothly between 0.5V and 4.5V. If not, replace the sensor.
- 44. If the sensor voltage is correct and wiring is intact, check the ECU for any calibration updates or malfunctions.
Common causes
- Faulty brake pressure sensor
- Damaged wiring or connectors in the brake system
- Low brake fluid level
- Calibration issue in the brake control module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's typically safe to drive, but the braking system may not perform optimally, so fix it soon.
Will this code come back after clearing it?
If the issue isn't resolved, yes, the code will likely return.
Why does this code appear along with codes for ABS or traction control?
Because the brake pressure sensor is tied to ABS/traction control systems; issues here disrupt their operations.
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