Brake Switch Stuck On
The brake switch signal is being detected as continuously on.
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 is telling the computer that the brakes are always pressed, which can affect systems like cruise control.
What the computer is actually seeing
The vehicle's computer receives a constant 'on' signal from the brake switch, indicated by a voltage level near 12 volts, when it should be fluctuating between 0 volts (off) and 12 volts (on).
What a healthy reading looks like
Brake switch should show 0 volts when not pressed and close to 12 volts 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.
- 1Inspect the brake switch wiring harness for damage or corrosion. Check for continuity in the brake switch connector and wiring.
- 2With the ignition on, use a multimeter to test the brake switch; expect 0 volts when not pressed and close to 12 volts when pressed.
- 3If readings are incorrect, replace the brake switch and retest. If it still reads incorrectly, check the wiring from the switch to the ECM.
Common causes
- Faulty brake switch
- Wiring issues (short circuit or broken wire)
- Faulty brake module or control module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It may be safe to drive short distances, but systems like cruise control may not work, and it could affect brake lights.
Will this code come back after clearing?
If the brake switch is faulty or there's a wiring issue, it will likely return.
Why might this code pair with C0368?
C0368 is related and indicates a fault in the brake switch circuit, often indicating similar issues with the brake switch or wiring.
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