Park Brake Switch Fault
Indicates an issue with the park brake switch 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 park brake switch is not sending the expected signal, which could mean it's faulty or there's a wiring issue.
What the computer is actually seeing
The engine control module (ECM) expects the park brake switch to show either a closed circuit (when applied) or an open circuit (when released).
What a healthy reading looks like
The park brake switch should provide a signal voltage between 0.5V to 5V while being pressed or released, depending on its design.
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. Inspect the park brake switch wiring and connectors for damage or corrosion. If found, repair or replace as needed. Decision: Is wiring intact? Yes -> 2, No -> Repair wiring and retest.
Common causes
- Faulty park brake switch
- Damaged or corroded wiring
- Poor connections at the park brake switch
- Software issues in the ECM
Typical repair cost
$100-$300
Related codes
Frequently asked questions
Is it safe to drive with this code active?
Yes, but you may not have a functional park brake, which can lead to safety issues when parked.
Will this code come back after clearing?
It will return if the underlying issue is not resolved.
Why does this code sometimes show with other codes?
Related codes often indicate multiple faults in the brake system or wiring, which can impact overall functionality.
Working a real vehicle right now?
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