OBD Guide

C066D

Service/Park Brake Chamber Pressure Sensor

C066D is an OBD-II diagnostic trouble code meaning: Service/Park Brake Chamber Pressure Sensor. Common causes: pressure sensor malfunction, open or shorted wiring harness. Estimated repair cost: $33–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • The brake system fault light is on
  • Incorrect operation of the parking brake
  • Reduced braking performance

Causes

  • Pressure sensor malfunction
  • Open or shorted wiring harness
  • Oxidation of sensor connector contacts
  • Air leak in the system

How to Fix

  1. Check the condition of the sensor and its connector
  2. Check the integrity of the wiring harness
  3. Check the system for air leaks
  4. Replace sensor if necessary
  5. Clear error codes and check system operation

Related codes

Error C066D by Vehicle Brand

FAQ

What does the C066D code mean?

C066D is an OBD-II diagnostic trouble code that indicates: Service/Park Brake Chamber Pressure Sensor

What causes a C066D error code?

The most common causes of C066D include: Pressure sensor malfunction; Open or shorted wiring harness; Oxidation of sensor connector contacts; Air leak in the system.

How do I fix a C066D diagnostic trouble code?

To fix C066D: Check the condition of the sensor and its connector. Check the integrity of the wiring harness. Check the system for air leaks. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C066D?

Limited driving only, diagnose soon

How much does it cost to fix C066D?

The estimated repair cost for C066D is $33–167. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat