C0612Right Park Brake Actuator Control Circuit High
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- With C0612 a lead of the right parking brake motor stays at or near battery voltage while the bridge tries to pull it low. Likely causes are a short to a live wire in the rear harness, a wrong splice after body or axle repair, or a defect in the output stage. Driver ICs such as the DRV8873-Q1 treat a short to the supply as its own protected fault and disable the output. GM's PIT5662A, written for park brake messages on the Acadia, XT5, Enclave and Traverse, has technicians measure both rear circuits at the brake module with the actuators plugged in; a reading above 6 ohms means wiring or actuator repair. No maker publishes C0612. The right brake keeps its last position, and a parking brake warning lights up.
- What you may notice
- Service parking brake message and warning lamp
- Right parking brake does not respond to the switch
- Code may return as soon as an apply is commanded
- Likely causes
- LikelyMotor lead shorted to a battery-fed wire in the rear harness
- PossibleFailed low-side switch in the control unit holding the lead high
- RareWrong pin or splice after an earlier harness or body repair
- Repair
- Medium · Usually a job for a workshop.Typical cost: €40 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.