Common Electric Parking Brake Problems and Related Solutions

Electronic parking brake systems (or electronic handbrake) are increasingly widely applied on both popular and high-end vehicles. This type of brake sets the driver with greater safety in stopping and parking situations. Probably, the electric parking brake has issues with the driving process that you can experience when using this type of brake. Previously, we learned some basic concepts of EPB, today, let’s detect EPB issues and find some solutions!

Most Common Electric Parking Brake Problems

The risk of electronic parking brake failure is less than with mechanical hand brakes but it can still happen. Below are the most common issues:

1. Electrical errors

We think it’s the most common issue with using electric parking brakes. Electrical malfunctions can occur due to issues with the wiring, connectors, or blown fuse. If there is a problem with the electrical components, the parking brake may not engage or release as intended, and it may require inspection and repair by a qualified mechanic.

2. Sensor problems

There is a great many of sensors incorporated to monitor the braking status and ensure proper operation of the electronic parking brake system. If there is a problem with the sensor, such as a faulty or misaligned sensor, it may submit incorrect feedback to the system, causing the parking brake to malfunction.

3. Mechanical issues 

The EPB system consists of mechanical components such as cables, calipers, or actuators. Over time, these components can wear out, become misaligned, or get stuck, leading to issues with engagement or release.

We can see that the main cause of parking brake malfunction is to short circuit or open circuit of the wires or circuits between the switch, controller, and actuator. When the brake system fails, the brake light on the dashboard will activate so the driver can detect the problem to repair it. Additionally, you can notice the burning smell due to the vehicle’s electronic handbrake being stuck and not working. And, it is possible that the brakes are wearing out because the handbrake is still working while the vehicle is running.

How To Fix Electric Parking Brake Problem?

If you're experiencing issues with your electric parking brake, this guide is here to help. We'll walk you through some common problems and their solutions, so you can get back on the road with confidence.  

1. Check electrical connections

One of the most crucial steps in troubleshooting electric parking brake issues is to inspect the electrical connections. This includes the wiring harnesses, connectors, and fuses. It's important to ensure they are secure and free from corrosion or damage. If you notice any loose or damaged connections, it's essential to repair or replace them as necessary.

2. Clean the brake mechanism 

If the parking brake is not engaging or releasing smoothly, dirt, debris, or corrosion may be affecting its operation. Thoroughly clean the brake mechanism, including the cables, calipers, and actuators. And don’t forget to clean the brake switch button because this part can easily accumulate dirt. Use a suitable cleaning agent and a brush or toothpick to remove any buildup or contaminants. Lubricate the moving parts with appropriate lubricants recommended by the vehicle manufacturer.

3. Resetting system 

In some cases, a system reset can resolve minor software or programming glitches. Consult your vehicle’s manual to identify the procedure for performing a system reset on the electric parking brake. 

Examine the parking brake sensors and switches for any damage or loose wires that could give incorrect readings and trigger the warning light. If possible, use a diagnostic scan tool to check for trouble codes related to the parking brake system. These codes can point you to a specific problem.

If you have tried the above steps and the electric parking brake problem persists or if you are uncertain about performing further troubleshooting, it is recommended to seek assistance from a qualified mechanic or authorized service center.

To improve the lifespan of electric parking brakes, it's crucial not to drive the vehicle while the brake warning light is still on. Although the electronic handbrake can automatically turn off when the vehicle is running, repeated instances of this can significantly affect the brake system, leading to potential failure. Stay cautious and aware of these risks.