P1549 Parking Brake Switch Circuit Failure

How to Diagnose and Solve P1549 Parking Brake Switch Circuit Failure Issues


Are you a car enthusiast who loves to solve car problems on your own? Or perhaps you’re just a regular car owner who wants to save some bucks on mechanic fees? Either way, you’ve come to the right place. Today, we’re going to tackle a common car issue: the P1549 Parking Brake Switch Circuit Failure.

Understanding the P1549 Code

First things first, let’s understand what the P1549 code means. This code is triggered when there’s a problem with the parking brake switch circuit. This could be due to a faulty switch, wiring issues, or a malfunctioning control module.

Signs of a P1549 Parking Brake Switch Circuit Failure

Before we dive into the solution, let’s identify the signs that indicate a P1549 Parking Brake Switch Circuit Failure. These include:

1. Warning Light

The most common sign is the illumination of the parking brake warning light on your dashboard.

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2. Brake Performance Issues

You might also notice a decrease in brake performance or unusual noises when applying the brakes.

3. Difficulty in Engaging or Disengaging the Parking Brake

If you’re having trouble engaging or disengaging your parking brake, it could be a sign of this issue.

Diagnosing the P1549 Code

Now that we’ve identified the signs, let’s move on to diagnosing the problem. Here’s a step-by-step guide:

1. Use an OBD-II Scanner

The first step is to use an OBD-II scanner to confirm the P1549 code. This device will read the trouble codes from your car’s computer and help you identify the problem.

2. Inspect the Parking Brake Switch

Next, inspect the parking brake switch for any visible damage or wear. If it’s faulty, it will need to be replaced.

3. Check the Wiring and Connectors

Check the wiring and connectors for any signs of damage or corrosion. If any are found, they will need to be repaired or replaced.

Solving the P1549 Parking Brake Switch Circuit Failure

Once you’ve diagnosed the problem, it’s time to solve it. Here’s how:

1. Replace the Parking Brake Switch

If the parking brake switch is faulty, replace it with a new one. Make sure to choose a high-quality switch to ensure longevity.

2. Repair or Replace Damaged Wiring or Connectors

If the wiring or connectors are damaged, repair or replace them as necessary.

3. Reset the Trouble Codes

After making the necessary repairs, use the OBD-II scanner to reset the trouble codes. If the P1549 code doesn’t come back, you’ve successfully solved the problem.


Dealing with a P1549 Parking Brake Switch Circuit Failure might seem daunting at first, but with the right knowledge and tools, you can diagnose and solve this issue on your own. Remember, regular maintenance and inspections can help prevent such problems in the future.


1. What causes a P1549 Parking Brake Switch Circuit Failure?

This issue is usually caused by a faulty parking brake switch, damaged wiring, or a malfunctioning control module.

2. Can I drive my car with a P1549 code?

While it might be possible to drive with this code, it’s not recommended as it could lead to brake performance issues.

3. How much does it cost to fix a P1549 Parking Brake Switch Circuit Failure?

The cost can vary depending on the exact issue and the make and model of your car. However, doing it yourself can significantly reduce the cost.