Electronic Parking Brake Control Module Fault
The electronic parking brake control module has detected an issue.
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 parking brake system has an error that may prevent the brake from engaging or releasing properly. It could be tied to any number of inputs that the control module expects and isn't getting right.
What the computer is actually seeing
The control module monitors inputs from the parking brake switch, actuator position, and vehicle speed. If it sees unexpected voltages (below 0.5V when pressed), or doesn't communicate with the actuator, it throws this code.
What a healthy reading looks like
Switch should show 0V when not pressed and close to battery voltage (12V) when pressed. The actuator position must align with specs; typically, within 1mm of intended position.
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 parking brake wiring and connectors for damage. Repair any frayed or broken wires. Check for water intrusion in connectors. Decision: If found, repair and retest.
- 22. Check the parking brake switch operation. Use a multimeter to confirm it shows 0V when not activated and 12V when activated. Decision: If it doesn’t function correctly, replace it and retest.
- 33. Test the parking brake actuator for proper movement and voltage supply. It should receive battery voltage during operation (around 12V). Decision: If it doesn’t receive voltage, trace wiring back for shorts; if it does and fails to operate, replace the actuator.
Common causes
- Faulty parking brake control module
- Bad electrical connections or wiring harness issues
- Defective parking brake switch or actuator
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code present?
It's not recommended to drive as the parking brake may become inoperative, which could be a safety hazard.
Will this code come back after repair?
As long as the issue is properly diagnosed and fixed with quality parts, it should not come back.
Why does this code pair with other codes, like C0472?
Codes are often interrelated. C0472 indicates issues with the parking brake system and could stem from shared wiring or components.
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