How to Fix P0580 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 P0580 error code. In this article, we will discuss what the P0580 error code means, its symptoms, and how to fix it.

What is P0580 Error Code?

P0580 is a generic OBD-II trouble code that indicates a malfunction in the cruise control system’s electrical circuit. The code is triggered when the powertrain control module (PCM) detects a voltage signal that is out of range in the cruise control switch circuit.

Symptoms of P0580 Error Code

The symptoms of a P0580 error code may include:

• The cruise control system may not work at all
• The cruise control system may work intermittently
• The cruise control system may engage but not maintain the set speed
• The check engine light may come on

Causes of P0580 Error Code

The most common causes of a P0580 error code are:

• A faulty cruise control switch
• A short or open circuit in the cruise control switch wiring
• A malfunctioning brake light switch
• A malfunctioning clutch pedal switch (if equipped)
• A malfunctioning PCM

How to Fix P0580 Error Code

Fixing a P0580 error code requires a systematic approach to diagnose and repair the underlying issue. Here are the steps to follow:

Step 1: Check the Cruise Control Switch

The first step is to check the cruise control switch for any signs of damage or wear. The switch is usually located on the steering wheel or the dashboard. Check the switch for any physical damage, such as cracks or broken buttons. If the switch looks fine, use a multimeter to test its continuity and resistance. Refer to the vehicle’s service manual for the correct testing procedure.

Step 2: Check the Cruise Control Switch Wiring

If the cruise control switch tests fine, the next step is to check the wiring that connects the switch to the PCM. Look for any signs of damage, such as frayed wires or loose connections. Use a multimeter to test the continuity and resistance of the wiring. Refer to the vehicle’s service manual for the correct testing procedure.

Step 3: Check the Brake Light Switch

The brake light switch is an essential component of the cruise control system. It tells the PCM when the brake pedal is pressed, which disengages the cruise control system. If the brake light switch is malfunctioning, it can cause a P0580 error code. Check the brake light switch for any signs of damage or wear. Use a multimeter to test its continuity and resistance. Refer to the vehicle’s service manual for the correct testing procedure.

Step 4: Check the Clutch Pedal Switch (if equipped)

If the vehicle is equipped with a manual transmission, it may have a clutch pedal switch that disengages the cruise control system when the clutch pedal is pressed. Check the clutch pedal switch for any signs of damage or wear. Use a multimeter to test its continuity and resistance. Refer to the vehicle’s service manual for the correct testing procedure.

Step 5: Check the PCM

If all the above components test fine, the last step is to check the PCM. The PCM is the brain of the cruise control system, and if it’s malfunctioning, it can cause a P0580 error code. Use a scan tool to check for any other error codes that may be present. If there are no other error codes, the PCM may need to be replaced.

Conclusion

A P0580 error code can be frustrating, but it’s not the end of the world. By following the steps outlined in this article, you can diagnose and fix the underlying issue. Remember to always refer to the vehicle’s service manual for the correct testing procedure.

FAQs

1. Can I still drive my car with a P0580 error code?

Yes, you can still drive your car with a P0580 error code, but the cruise control system will not work. However, if the check engine light is also on, it’s best to have the issue diagnosed and repaired as soon as possible.

2. How much does it cost to fix a P0580 error code?

The cost of fixing a P0580 error code depends on the underlying issue. If it’s a simple fix, such as replacing a faulty switch, it may cost less than $100. However, if the PCM needs to be replaced, it can cost upwards of $500.

3. Can I fix a P0580 error code myself?

If you have experience working on cars and have the necessary tools, you can fix a P0580 error code yourself. However, if you’re not confident in your abilities, it’s best to take your car to a professional mechanic.