Brake System Sensor Fault
There’s a failure in a brake system 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 computer is seeing that something is wrong with the sensor that measures brake pressure or position, which could affect how brakes work.
What the computer is actually seeing
The brake control module detects a signal outside of the normal operating range, indicating a malfunction in the sensor circuit.
What a healthy reading looks like
Brake pressure sensor voltage should be between 0.5V to 4.5V depending on brake application.
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 connectors to the brake pressure sensor for signs of damage or corrosion. Repair as necessary and retest. Decision: Did the code clear? If yes, problem solved. If no, proceed to the next step.
- 22. Measure the voltage at the brake pressure sensor connector with the key in the ON position. Expected voltage should be around 0.5V to 4.5V based on brake application. Decision: Is the voltage within this range? If yes, go to step 3. If no, suspect wiring issues or a bad ground.
- 33. Disconnect the sensor and measure the resistance across its terminals. Expected resistance is typically between a few ohms to a few hundred ohms. Decision: Is resistance within that range? If yes, replace the sensor. If no, the sensor is fine but wiring problems may exist.
Common causes
- Damaged wiring or connectors in the brake sensor circuit
- Faulty brake pressure sensor
- Corroded terminals causing poor connection
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to fix it soon as it may impact braking performance, but you might still be able to drive it short distances.
Will this code come back after I fix it?
If you properly address the underlying issue, it should not return.
Why did this code trigger after recent brake work?
Any disturbance to the brake system could affect the sensors or wiring, especially if not properly reconnected.
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 →