C066F

Service/Park Brake Chamber Pressure Too Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

The parking brake indicator is on
The parking brake does not apply or does not apply fully
Reduced braking performance

Causes

Air leak in pneumatic system
Parking brake valve malfunction
Wiring harness damage
Pressure sensor malfunction
Dirty or clogged air lines

How to Fix

Check the pneumatic system for leaks
Check the condition of the parking brake valves
Check the integrity of the wiring harness
Check the operation of the pressure sensor
Clear or replace clogged air lines

Related codes

C0670 C0671 C0672