Brake System Status
Indicates a failure in the brake system status signal.
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 not getting a good signal about the status of your vehicle's brake system, which could mean the brakes are not working properly or there's a wiring issue.
What the computer is actually seeing
The ECM expects a status signal from the brake system, which should change depending on whether the brakes are applied or released. It generally reads between 0-5 volts depending on the brake pedal position.
What a healthy reading looks like
Expected voltage should be near 0V when brakes are released and near 5V when brakes are 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 and ensure it is okay. If low, add fluid and check for leaks.
- 22. Inspect the wiring and connectors for the brake status switch for any signs of damage, fraying, or corrosion.
- 33. With the ignition on, use a multimeter to check the voltage at the brake status switch connector while someone presses the brake pedal. Expected values should be near 0V released and near 5V applied.
- 44. If the voltage readings are out of range, replace the brake status switch and retest.
- 55. If the switch is good but the code persists, check the continuity of the wires from the switch to the ECM.
Common causes
- Damaged brake status switch
- Wiring issues in the brake system circuit
- Faulty ECM input for brake status signal
- Corrosion or dirt at connector terminals
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to fix this code as soon as possible because it directly impacts the brake system's performance.
Will this code come back after clearing it?
If the underlying issue isn't resolved, the code will likely return after clearing.
Why do I see this code with other codes related to the braking system?
These codes can appear together because they often share the same components or wiring.
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 →