P0579 Cruise Control Related Malfunction

Introduction

Cruise control is a feature that allows drivers to maintain a constant speed without having to keep their foot on the accelerator pedal. However, when the cruise control system malfunctions, it can be frustrating and even dangerous. One of the most common cruise control-related malfunctions is the P0579 error code. In this article, we will discuss what causes this error code and how to fix it.

P0579 is an error code that indicates a malfunction in the cruise control system. This code is triggered when the cruise control system detects a problem with the brake pedal switch circuit. The brake pedal switch is a safety feature that disengages the cruise control system when the brake pedal is pressed. When the cruise control system detects a problem with this switch, it will disable the system and trigger the P0579 error code.

There are several possible causes of the P0579 error code. The most common cause is a faulty brake pedal switch. This switch can become worn or damaged over time, causing it to malfunction. Another possible cause is a problem with the wiring or connectors in the brake pedal switch circuit. If the wiring or connectors become corroded or damaged, it can cause the cruise control system to malfunction.

Fixing the P0579 error code requires identifying and addressing the underlying cause of the problem. Here are the steps to follow:

Step 1: Check the Brake Pedal Switch

The first step is to check the brake pedal switch. This switch is located under the dashboard, near the brake pedal. To check the switch, follow these steps:

Turn off the engine and remove the key from the ignition.
Locate the brake pedal switch under the dashboard.
Check the switch for any signs of wear or damage.
Press and release the brake pedal several times to ensure that the switch is functioning properly.

If the switch is worn or damaged, it will need to be replaced. You can purchase a replacement switch from your local auto parts store or online.

Step 2: Check the Wiring and Connectors

If the brake pedal switch is functioning properly, the next step is to check the wiring and connectors in the brake pedal switch circuit. Follow these steps:

Locate the wiring and connectors in the brake pedal switch circuit.
Check the wiring and connectors for any signs of corrosion or damage.
If you find any corrosion or damage, clean or replace the affected parts.

Step 3: Clear the Error Code

Once you have identified and addressed the underlying cause of the P0579 error code, you will need to clear the code from the vehicle’s computer. To do this, follow these steps:

Disconnect the negative battery cable from the battery.
Wait for at least 10 minutes to allow the vehicle’s computer to reset.
Reconnect the negative battery cable.

Conclusion

The P0579 error code can be frustrating, but it is usually easy to fix. By following the steps outlined in this article, you can identify and address the underlying cause of the problem and get your cruise control system back up and running.

FAQs

1. Can I still drive my car if the P0579 error code is present?

Yes, you can still drive your car if the P0579 error code is present. However, you will not be able to use the cruise control system until the problem is fixed.

2. How much does it cost to replace a brake pedal switch?

The cost of replacing a brake pedal switch can vary depending on the make and model of your vehicle. On average, you can expect to pay between $50 and $150 for a replacement switch.

3. Can I fix the P0579 error code myself?

Yes, you can fix the P0579 error code yourself if you have some basic mechanical knowledge and the right tools. However, if you are not comfortable working on your vehicle, it is best to take it to a professional mechanic.

How to Fix P0579 Cruise Control Related Malfunction