P0573 code — how to fix error fast

The code P0573 can seem like it’s not a big deal, but it can turn out to be pretty important for maintaining your driving safety. As it turns out, the P0573 code meaning is often misunderstood by most drivers, so we wanted to help you out with a complete review of it.

Our team of dedicated automotive experts will be at your disposal as to how you can diagnose the code, figure out the underlying issue behind it, and fix it so you can get back on the road with your car without having to worry about safety concerns.

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What does the P0573 code mean?

The P0573 code is a generic powertrain code that indicates a malfunction in the brake switch circuit. In simpler terms, it means that the vehicle’s computer has detected an issue with the brake light switch. The computer will trigger the code and turn on the check engine light to alert the driver that there is a problem.

It’s important to understand the P0573 code because it can affect the vehicle’s performance and safety. If the brake light switch is not working correctly, the vehicle’s brake lights may not illuminate when the brakes are applied. This can result in accidents as other drivers may not be able to tell when your car is slowing down or stopping.

What causes the P0573 code?

There are several potential causes of the P0573 code. While you may instantly assume it has to do with a brake light switch, you’d be on the right path, but there are many other possible reasons that could be behind the code. So, here’s our overview of each of those:

Faulty brake pedal position sensor

A malfunction in the BPPS can cause the sensor to send an incorrect or erratic signal to the ECM, triggering the P0573 code.

Wiring issues

Damaged or corroded wiring in the BPPS circuit can cause a voltage drop or short circuit, resulting in an out-of-range signal being sent to the ECM.

Failed ECM

In rare cases, a failed ECM may be the root cause of the P0573 code. This can occur if the ECM’s internal circuits that receive and process signals from the BPPS have failed.

Other issues

The P0573 code can also be caused by issues with other related systems, including the brake light switch, ABS system, traction control system, or cruise control system. In some cases, a malfunctioning component in one of these systems can trigger a false P0573 code.

Which car models does the P0573 code affect the most?

The P0573 code can appear on any vehicle, but some models are more prone to the issue than others. Some of the car models that are known to have problems with the brake light switch circuit include:

• Chevy Cobalt: The 2005-2010 Chevrolet Cobalt has been known to experience issues with its BPPS system that can trigger a P0573 code.
• Honda Accord: The 2003-2007 Honda Accord has been known to have problems with its brake light switch that can cause the BPPS circuit to malfunction and trigger the P0573 code.
• Nissan Versa: This car has been known to face similar issues with the brake pedal position sensor as the Cobalt SS, so that’s why it earned its place on this list.

How to diagnose the P0573 code

Diagnosing the P0573 code involves several steps, and while it’s best to leave things to a professional mechanic, our team wanted to share a few tips on dealing with this issue accordingly with you:

Look for other associated codes

The P0573 code is often accompanied by other codes related to the brake system, such as codes for the brake light switch or ABS system. Checking for these additional codes can help narrow down the cause of the problem.

Inspect the pedal position sensor

A visual inspection of the brake pedal position sensor (BPPS) and its wiring can help determine if there are any obvious issues, such as damage or corrosion.

Test the brake pedal position sensor

Using a multimeter, a technician can test the voltage of the BPPS circuit to determine if there are any issues with the sensor or its wiring.

Check the brake light switch

If the BPPS system is functioning properly, the next step is to check the brake light switch, which is often connected to the same circuit as the BPPS.

How to fix the P0573 code

Fixing the P0573 code will depend on the cause of the issue. If the brake light switch is faulty, it will need to be replaced. If there is a short or open circuit, the wiring will need to be repaired or replaced. We could go on and on, but it’s best to give you a perspective of the most common solutions to the code:

Replace the brake pedal pressure

If the BPPS is found to be faulty, it will need to be replaced with a new sensor. This is often the most common solution to fixing the P0573 code.

Repair or replace damaged wiring

If the issue is found to be with damaged or corroded wiring in the BPPS circuit, the wiring will need to be repaired or replaced.

Replace the brake switch

If the brake light switch is found to be faulty, it will need to be replaced with a new switch to fix the code, and this will often be among the cheapest solutions.

Clear the stored codes

Once the underlying issue has been fixed, any stored codes in the vehicle’s memory will need to be cleared using specialized diagnostic equipment.

How to prevent the P0573 code

The best way to prevent the P0573 code from appearing is through routine maintenance. Regularly inspecting the following components of the braking system may help prevent this code from occurring again:

• Checking the brake light switch
• Inspecting the circuits for signs of damage or wear
• Check the brake fluid occasionally

It’s also important to properly maintain the affected system. For example, keeping the brake fluid at the proper level can help prevent damage to the brake control module. Regularly cleaning and lubricating the brake pedal can also help prevent damage to the brake light switch.

Our take

Overall, the code P0573 can be pretty harmless for you since you can’t even spot that your brake lights may not be working. However, it can be pretty confusing for the drivers driving behind you in the lane, and it may even cause a safety concern when driving on roads with poor lighting.

So, we advise you to immediately repair the faulty brake switch component so you can feel safe behind the wheel again, and this guide should help you achieve just that.