Brake System Pressure Sensor Circuit Failure
There's a problem with the brake pressure sensor circuit.
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 is either sending incorrect information or not sending anything at all to the computer, which affects how the braking system functions.
What the computer is actually seeing
The ABS module expects a normal voltage signal between 0.5V and 4.5V from the brake pressure sensor while the vehicle is in operation.
What a healthy reading looks like
0.5V to 4.5V is the expected voltage from the brake pressure sensor under different load conditions.
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 wiring and connector for the brake pressure sensor. Look for fraying, corrosion, or disconnections. -> If wiring/connectors are damaged, repair or replace them. -> If not, proceed to the next step.
- 22. Check the brake fluid level in the master cylinder. Low fluid can cause sensor issues. -> If low, fill to the recommended level and test again. -> If fluid level is good, proceed to the next step.
- 33. Measure the voltage at the brake pressure sensor connector with a multimeter while the vehicle is in operation. -> You're looking for a voltage between 0.5V and 4.5V. -> If voltage is within range, the sensor is functioning correctly; check ABS module. -> If voltage is outside the range, replace the brake pressure sensor.
Common causes
- Damaged wiring or connectors in the brake pressure sensor circuit
- Faulty brake pressure sensor
- Failed ABS control module
Typical repair cost
$$
Related codes
Frequently asked questions
Can I drive my vehicle with this code?
It's not recommended to drive with a C1130 code, as it indicates potential braking issues that could compromise safety.
Will this code come back after clearing?
If the underlying issue isn't fixed, yes, the code will likely return.
Why does this code sometimes pair with ABS codes?
Brake pressure is integral to ABS functionality; issues with the sensor can trigger both codes.
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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