PARKING BRAKE SWITCH ERROR
The parking brake switch signal is malfunctioning or missing.
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 vehicle's computer isn't getting a proper signal from the parking brake switch, which tells it whether the parking brake is engaged or not.
What the computer is actually seeing
The parking brake switch should show 0 volts when released (open circuit) and close to 12 volts when engaged (closed circuit).
What a healthy reading looks like
0V when the brake is released, 12V when engaged.
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 parking brake lever position to ensure it’s fully released. Go to Step 2.
- 22. Inspect the wiring and connectors on the parking brake switch for damage or corrosion. If damaged, repair or replace as necessary. Go to Step 3.
- 33. Measure voltage at the parking brake switch with the lever released, should be close to 0V. If not, replace the switch. Go to Step 4.
- 44. With the lever engaged, check voltage again; it should be near 12V. If both readings are out of spec, check for shorts in wiring before replacing the switch.
Common causes
- Faulty parking brake switch
- Damaged wiring or connectors
- Corroded terminals
- Improperly installed aftermarket accessories that affect wiring
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
It's moderate severity; driveability may be affected. Fix it soon.
Will this code come back after clearing?
If the underlying issue isn't addressed (like a faulty switch or damaged wiring), it likely will.
Why does this code occur with other codes?
Other codes may indicate issues with the braking system, often sharing wiring or components.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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