OBD-II code · Chassis
C066E Service/Park Brake Chamber Pressure Too High
Pressure in the service/park brake chamber exceeded safe limit.
Is it safe to drive with C066E?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyPressure regulator stuck
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–6 h
- Emissions test
- Usually unaffected
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Service Park Brake Chamber, Air Compressor
Related codes
- C066BRight Rear Wheel Speed Sensor B Correlation
- C066CRight Rear Wheel Speed Sensor B Incorrect Component Installed
- C066DService/Park Brake Chamber Pressure Sensor
- C066FService/Park Brake Chamber Pressure Too Low
- C0670Electric Park Brake Actuator Left Circuit
- C0671Electric Park Brake Actuator Right Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.