Brake Switch Circuit Intermittent
There’s a problem with the brake switch signal 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)
The brake switch tells the system when you're pressing the brake pedal, and if it’s not working right, the car may not know when to stop things from moving or engaging cruise control.
What the computer is actually seeing
The control module sees intermittent or inconsistent signal voltage from the brake switch, typically expecting a 5V signal when pressed and near 0V when released.
What a healthy reading looks like
Brake switch should show 0V when not pressed and around 5V when pressed.
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. Start with a visual inspection of the brake switch and wiring for any obvious damage or disconnections.
- 22. Check the connector for corrosion or dirt; clean and reconnect if necessary.
- 33. Use a multimeter to measure voltage at the brake switch connector; look for 0V when not pressed and 5V when pressed. If not, replace the switch.
- 44. If the switch is good, check the wiring back to the control module for continuity and shorts. Repair as needed.
- 55. Clear the code and take the vehicle for a test drive to see if the code returns.
Common causes
- Faulty brake switch
- Wiring issues or poor connections
- Corroded terminals at the brake switch
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable, but fix it soon to ensure safety features like cruise control work properly.
Will the code come back after clearing it?
If the underlying issue isn't fixed, yes, it will likely return.
Why does this code pair with other codes?
Multiple codes can indicate a shared issue, often related to the same switch or circuit.
Working a real vehicle right now?
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