Code result
C066E
Service/Park Brake Chamber Pressure Too High
High severity
What it means
Pressure in the service/park brake chamber exceeded safe limit.
Is it safe to drive?
No — stop driving
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.
Most likely causes
Pressure regulator stuck
highOne of the most commonly reported causes for this code — check this first.
Related help
Get the full diagnosis
Add your vehicle and see step-by-step repair help, recalls, and TSBs in Wrenchify.
Diagnose C066E freeNo credit card required