Park Brake Switch Status
Indicates a signal issue with the park brake switch.
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 the right signal from the park brake switch when you engage or disengage the brake. It should see around 0 volts when the brake is off and around 12 volts when it's on, depending on the system configuration.
What the computer is actually seeing
The system expects to see either a high or low signal from the park brake switch corresponding to its state. If the switch is malfunctioning or the wiring is damaged, the computer may not receive the correct signal level.
What a healthy reading looks like
0 volts when park brake is off; 12 volts when park brake is 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. Inspect the park brake switch wiring and connectors for damage or corrosion.
- 22. Verify power supply to the park brake switch; you should see battery voltage (around 12V) when engaged.
- 33. Check continuity of the switch by unplugging and testing it; should show open circuit when disengaged and closed circuit when engaged.
- 44. If the switch is working, check for damage in the wiring harness up to the ECM.
- 55. Clear the code and test drive; if it returns, consider reprogramming or replacing the ECM.
Common causes
- Faulty park brake switch
- Damaged wiring or connectors
- Corroded connectors or terminals
- Software issue in the ECU or transmission control module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code present?
Yes, but be aware that you may have limited functionality with the parking brake and should address it soon.
Will this code come back after clearing it?
It may come back if the underlying issue isn't resolved, like a faulty switch or damaged wiring.
Why is this related to the transmission?
The park brake switch can impact transmission functions, especially in vehicles with automatic transmissions where it may affect shift interlocks.
Working a real vehicle right now?
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