Brake Switch Circuit Range/Performance Problem
There's a problem with the brake switch signal to the computer.
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 isn't getting a correct signal from the brake switch, which might be stuck or not working right, causing issues with systems that depend on knowing when you're braking.
What the computer is actually seeing
The brake switch should show either a closed circuit (0 volts when pressed) or an open circuit (about 12 volts when released). If the readings are erratic or outside this range, that's a problem.
What a healthy reading looks like
0 volts when brake pedal is pressed, 12 volts when released.
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.
- 1Check the brake switch wiring for damage or loose connections.
- 2Verify the function of the brake switch using a voltmeter: check for 0 volts when the pedal is pressed and 12 volts when released.
- 3Inspect sensor connectors for corrosion or poor connection.
- 4Check the vehicle's fuse related to the brake switch circuit.
- 5If all checks pass but the code remains, consider replacing the brake switch.
Common causes
- Faulty brake switch
- Damaged wiring or connectors to the switch
- Bad ground connection at the switch
- Faulty ABS module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally drivable, but you may lose some braking assistance features, so address it soon.
Will this code come back after clearing?
If the issue isn't fixed, yes, it will likely return after some driving.
Why do I see this code with other codes?
This issue often pairs with ABS or traction control codes because those systems rely on accurate brake switch signal.
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 →