Electronic Parking Brake Switch Circuit Fault
There's a problem with the electronic parking brake switch or circuit.
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 electronic parking brake system uses a switch to determine if the brake is engaged or released. If there's a fault in the switch or wiring, it can throw this code.
What the computer is actually seeing
The brake control module is receiving inconsistent voltage signals from the electronic brake switch. Normally, when the brake is applied, the voltage should read close to 0V (grounded) and when released, it should be around 5V.
What a healthy reading looks like
0V when the brake is applied; 5V when it’s released.
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 wiring and connectors for visible damage or corrosion. Check for continuity in the wiring harness. Decision: If any issues found, repair or replace as needed. If no issues, go to step 2.
- 22. Test the voltage at the electronic parking brake switch while cycling the switch. Expected readings are 0V with the brake applied, and around 5V with released. Decision: If readings are out of range, replace the switch. If readings are correct, go to step 3.
- 33. Check the brake control module for faults using a scan tool. Look for additional codes or data related to the parking brake system. Decision: If module faults are found, consider replacing the brake control module.
Common causes
- Faulty electronic parking brake switch
- Damaged wiring or connectors
- Corrosion at the connectors
- Faulty brake control module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally safe for short distances, but you should fix the issue soon to ensure the parking brake functions properly.
Will this code come back after clearing it?
If the underlying issue isn't fixed, the code will likely return.
Why do I sometimes see this code with problems in the ABS system?
The electronic parking brake system and ABS may share common components or circuits, leading to related fault codes.
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