OBD-II code · Chassis
C0618 Park Brake Control Module Control Circuit High
Park brake control module supply voltage above expected range. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Is it safe to drive with C0618?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyCharging system overvoltage
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Epb Module, Alternator
Related codes
- C0615ESC Calibration Required
- C0616Park Brake Control Module Control Circuit Performance
- C0617Park Brake Control Module Control Circuit Low
- C0619Brake Pedal Position Sensor A Offset Exceeded Learning Limit
- C061ABrake Pedal Position Sensor B Offset Exceeded Learning Limit
- C061BECM Request - Forced Traction Control Disable
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.