What does code C066E mean?

Q: What does code C066E mean?

Service/Park Brake Chamber Pressure Too High. This code indicates that the electronic brake control module has detected an excessively high pressure in the service brake or park brake chamber circuit, often related to air brake systems on heavy-duty vehicles. The module monitors pressure sensors and sets this code when the pressure exceeds the expected range for the current braking demand, signaling a potential fault in the pressure regulation or sensor feedback.

DTC codes / C06xx · Brakes, steering and suspension / C066E

C066EService/Park Brake Chamber Pressure Too High

This code indicates that the electronic brake control module has detected an excessively high pressure in the service brake or park brake chamber circuit, often related to air brake systems on heavy-duty vehicles. The module monitors pressure sensors and sets this code when the pressure exceeds the expected range for the current braking demand, signaling a potential fault in the pressure regulation or sensor feedback.

SystemChassis

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

AreaBrakes, steering and suspension

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.