P0573 Technical Description
Brake Switch “A” Circuit High
In this guide, we’ll cover everything you need to know about the P0573 trouble code, from its meaning to how you can fix it. If you’re seeing this code, you’re probably frustrated and looking for answers.
I’ve encountered the P0573 code several times and have the experience to guide you through it.
We’ll break down the official definition, common symptoms, potential causes, and practical fixes to get your car back on track. Ready to get started?
Let’s jump right into it.
Key Takeaways
- The P0573 code indicates “Brake Switch ‘A’ Circuit High.”
- This issue often involves a faulty brake light switch or related wiring problems.
- Symptoms include brake lights not working and cruise control issues.
- Common causes are damaged wiring, loose connections, or a faulty brake switch.
- Diagnosing involves inspecting the switch, wiring, and connections.
- Fixes include replacing faulty components and resetting the trouble code with an OBD-II scanner.
Table of ContentsShow
What Does P0573 Trouble Code Mean?
The P0573 trouble code means there’s an issue with the brake switch circuit. Specifically, it indicates that the signal from the brake switch to the Engine Control Module (ECM) is too high.
The brake switch is a critical component because it tells the ECM when you’re pressing the brake pedal.
When you press the brake pedal, the brake switch sends a signal to the ECM, which then engages the brake lights and can affect other systems like cruise control.
If the ECM detects an abnormally high voltage from this switch, it triggers the P0573 code.
Several things can cause this high voltage signal. It could be a simple electrical fault, like a damaged wire or a loose connection in the brake switch circuit.
It might also be due to a faulty brake switch itself. In some cases, the problem could stem from issues within the ECM, although this is less common.
Driving with this code can be risky. The brake lights might not function properly, which can increase the likelihood of an accident.
Additionally, cruise control might be disabled, which could be inconvenient if you rely on it for long drives.
If you see the P0573 code, it’s important to address it promptly. Ignoring it can lead to more severe issues down the road, not to mention potential safety hazards.
In the next sections, we’ll delve into the symptoms you might notice, the common causes of this issue, and practical steps to fix it.
P0573 Trouble Code Symptoms
When your vehicle triggers the P0573 trouble code, you may notice the following symptoms:
- Brake lights not working
- Cruise control not engaging or turning off unexpectedly
- Check Engine Light illuminated
- Brake lights staying on continuously
- ABS (Anti-lock Braking System) warning light activated
P0573 Trouble Code Causes
Several issues can lead to the P0573 trouble code. Here are the most common causes:
- Faulty brake light switch
- Damaged or frayed wiring in the brake switch circuit
- Loose or corroded electrical connections
- Malfunctioning Engine Control Module (ECM)
- Faulty cruise control switch
How To Fix A P0573 Trouble Code
Fixing the P0573 trouble code involves diagnosing the root cause and then addressing it. Here’s a step-by-step guide to help you through the process:
1. Scan for Additional Codes
Use an OBD-II scanner to check for any additional trouble codes that might provide more context. This can help pinpoint whether the issue is isolated or part of a larger problem.
2. Inspect the Brake Light Switch
Locate the brake light switch, usually found near the brake pedal. Check for any visible damage or wear. If the switch looks worn or broken, replace it.
3. Examine the Wiring
Carefully inspect the wiring connected to the brake light switch. Look for any signs of damage, such as frayed wires, corrosion, or loose connections. Repair or replace any damaged wiring.
4. Check Electrical Connections
Ensure all electrical connections are secure and free of corrosion. Clean any corroded connectors and make sure they are tightly connected.
5. Test the Brake Light Switch
Use a multimeter to test the brake light switch. Ensure it’s operating correctly by checking for continuity when the brake pedal is pressed. If there’s no continuity or if the switch fails the test, replace it.
6. Inspect the ECM
Though rare, the ECM could be at fault. If all other components are functioning correctly and the code persists, consider having a professional check the ECM.
7. Reset the Code
After making repairs, use the OBD-II scanner to reset the trouble code. Start the vehicle and check to see if the code reappears. If it does, further diagnosis may be needed.
By following these steps, you can diagnose and fix the issue causing the P0573 trouble code, ensuring your vehicle’s brake lights and related systems work properly again.
Conclusion
You now know what the P0573 trouble code means and how to fix it. Ready to tackle the issue?
Have you checked your brake light switch before? How did it go?
Drop a comment below with your experience or any questions you have about the P0573 code!
