How to Fix P0574 Cruise Control/Brake Switch A Circuit High

Introduction

If you’re experiencing issues with your cruise control or brake lights, it could be due to a P0574 error code. This code indicates that there is a problem with the cruise control/brake switch A circuit, which can cause the cruise control to stop working or the brake lights to stay on. In this article, we’ll go over how to fix this issue and get your car back to working properly.

What is P0574 Cruise Control/Brake Switch A Circuit High?

P0574 is an error code that indicates there is a problem with the cruise control/brake switch A circuit. This circuit is responsible for sending signals to the car’s computer to activate the cruise control or turn on the brake lights. When this circuit is not functioning properly, it can cause the cruise control to stop working or the brake lights to stay on.

Step-by-Step Guide to Fixing P0574 Cruise Control/Brake Switch A Circuit High

Step 1: Check the Brake Light Switch

The first thing you should do when you encounter a P0574 error code is to check the brake light switch. This switch is located under the brake pedal and is responsible for turning on the brake lights when you press the pedal. If the switch is faulty, it can cause the brake lights to stay on, which can trigger the P0574 error code.

To check the brake light switch, start by locating it under the brake pedal. Once you’ve found it, press the brake pedal down and see if the switch moves. If it doesn’t, the switch may be faulty and need to be replaced.

Step 2: Check the Cruise Control Switch

If the brake light switch is functioning properly, the next thing you should check is the cruise control switch. This switch is located on the steering wheel and is responsible for activating the cruise control. If the switch is faulty, it can cause the cruise control to stop working, which can trigger the P0574 error code.

To check the cruise control switch, start by locating it on the steering wheel. Once you’ve found it, press the switch and see if the cruise control activates. If it doesn’t, the switch may be faulty and need to be replaced.

Step 3: Check the Wiring

If both the brake light switch and cruise control switch are functioning properly, the next thing you should check is the wiring. The wiring for the cruise control/brake switch A circuit runs from the switches to the car’s computer. If there is a problem with the wiring, it can cause the circuit to malfunction, which can trigger the P0574 error code.

To check the wiring, start by inspecting it for any visible damage or wear. If you notice any damage, you may need to replace the wiring. If the wiring looks fine, you can use a multimeter to test the circuit for continuity. If there is a break in the circuit, you may need to repair or replace the wiring.

Step 4: Replace the Cruise Control/Brake Switch A Circuit

If all else fails, the last thing you can do is replace the cruise control/brake switch A circuit. This circuit is responsible for sending signals to the car’s computer to activate the cruise control or turn on the brake lights. If the circuit is faulty, it can cause the P0574 error code to appear.

To replace the circuit, start by locating it in your car’s manual. Once you’ve found it, remove the old circuit and replace it with a new one. Make sure to follow the manufacturer’s instructions carefully to ensure that the new circuit is installed correctly.

Conclusion

If you’re experiencing issues with your cruise control or brake lights, it could be due to a P0574 error code. This code indicates that there is a problem with the cruise control/brake switch A circuit, which can cause the cruise control to stop working or the brake lights to stay on. By following the steps outlined in this article, you can diagnose and fix the issue and get your car back to working properly.

FAQs

1. Can I still drive my car with a P0574 error code?

It’s not recommended to drive your car with a P0574 error code. This code indicates that there is a problem with the cruise control/brake switch A circuit, which can cause the cruise control to stop working or the brake lights to stay on. This can be a safety hazard and should be addressed as soon as possible.

2. How much does it cost to fix a P0574 error code?

The cost to fix a P0574 error code can vary depending on the cause of the issue. If it’s a simple fix like replacing the brake light switch, it may only cost a few dollars. However, if the issue is more complex like replacing the cruise control/brake switch A circuit, it can cost several hundred dollars.

3. Can I fix a P0574 error code myself?

If you have experience working on cars and feel comfortable diagnosing and fixing the issue, you may be able to fix a P0574 error code yourself. However, if you’re not familiar with car repairs, it’s recommended to take your car to a professional mechanic to ensure that the issue is properly diagnosed and fixed.