C0147 moderate

Parking Brake Actuator Circuit Malfunction

The C0147 code means the vehicle's onboard diagnostic system has detected: Parking Brake Actuator Circuit Malfunction. This is a moderate severity code.

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Keep driving?: Short distances only
DIY difficulty: hard
Estimated cost: $200 - $800 (parts and labor)

Read ABS Codes

BlueDriver Bluetooth Pro Scanner

Basic scanners cannot read ABS codes. BlueDriver reads all systems including ABS, SRS, and transmission through your phone.

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Read ABS Codes

LAUNCH CRP123X (Reads ABS + Chassis)

Basic scanners cannot read ABS codes. This one reads all four systems so you know exactly which sensor failed.

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Common Symptoms

Electronic parking brake warning light on
Parking brake will not engage or release
Parking brake stuck on
Parking brake button not responding
Hill hold assist not working

Probable Causes (Ranked by Likelihood)

Failed electric parking brake actuator motor Very High
Parking brake cable seized or broken High
Parking brake control module fault Moderate
Wiring issue to parking brake actuator Low

Step-by-Step Diagnostic Procedure

Scan parking brake module for DTCs
Test parking brake actuator with scan tool commands
Check actuator motor for power and ground
Inspect parking brake cables for seizure
Verify parking brake switch input signal

Frequently Asked Questions

How does an electronic parking brake work?

Instead of a traditional hand lever or foot pedal, an electric motor at each rear caliper or a central motor with cables applies and releases the parking brake when a button is pressed.

Can I release a stuck electronic parking brake?

Some vehicles have an emergency manual release procedure. Check your owner's manual. A scan tool can also be used to command the actuator to release in many cases.

Will the electronic parking brake engage automatically in an emergency?

Many vehicles have a dynamic braking feature where holding the parking brake button while driving will apply the brakes progressively. This is a safety feature for brake failure situations.