OBD Guide

C066F

Service/Park Brake Chamber Pressure Too Low

C066F is an OBD-II diagnostic trouble code meaning: Service/Park Brake Chamber Pressure Too Low. Common causes: air leak in pneumatic system, parking brake valve malfunction. Estimated repair cost: $56–167.

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

  1. Check the pneumatic system for leaks
  2. Check the condition of the parking brake valves
  3. Check the integrity of the wiring harness
  4. Check the operation of the pressure sensor
  5. Clear or replace clogged air lines

Related codes

Error C066F by Vehicle Brand

FAQ

What does the C066F code mean?

C066F is an OBD-II diagnostic trouble code that indicates: Service/Park Brake Chamber Pressure Too Low

What causes a C066F error code?

The most common causes of C066F include: Air leak in pneumatic system; Parking brake valve malfunction; Wiring harness damage; Pressure sensor malfunction.

How do I fix a C066F diagnostic trouble code?

To fix C066F: Check the pneumatic system for leaks. Check the condition of the parking brake valves. Check the integrity of the wiring harness. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C066F?

Limited driving only, diagnose soon

How much does it cost to fix C066F?

The estimated repair cost for C066F is $56–167. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat