P1571 code — how to fix error fast
Decoding the P1571 code can pave the way for an optimal driving journey. Understand its significance now.
When dealing with OBD2 codes, drivers are mostly worried about the powertrain and the gearbox, but codes like P1571 remind us of some other possible issues. Our team found out that this code is among the most common OBD errors you could experience, and for a good reason.
That’s why we’ve dedicated our time and knowledge to bring you a guide on P1571 code meaning in the effort of making repairs and code removal easier for you. This guide will outline all the possible reasons behind the code along with recommended diagnostic methods and solutions.
Why you can trust REREV’s OBD2 code advice: Our automotive expert researchers with experienced mechanics undertakes a thorough research methodology to deliver precise insights on OBD codes. Find out more about OBD2 codes research process..
What does the P1571 code mean?
The P1571 code is a fault code that is triggered when there is a problem in the brake pedal switch circuit. This circuit is responsible for detecting when the brake pedal is depressed, which in turn tells your vehicle’s computer to release the throttle and apply the brakes.
When the circuit fails, your vehicle may not be able to detect when you’re pressing on the brake pedal, which can cause serious safety issues. The code could come with a few symptoms like loss of power or acceleration, while in other cases, you may notice that your brakes are not as responsive as they should be.
If left unchecked, the code can cause serious consequences, such as a loss of vehicle control, which can lead to accidents and even fatalities. Therefore, it’s important to address the issue as soon as possible to prevent any further damage to your vehicle or yourself.
What causes the P1571 code?
Even though things may seem pretty straightforward after our explanation, that doesn’t mean that a single culprit is always responsible for the code. There are several potential reasons that could led to the code’s activation in your car, so here’s what it looks like:
Faulty brake pedal switch
The most common cause of the code is a faulty brake pedal switch. This switch is responsible for detecting when the brake pedal is depressed, and when it fails, your vehicle’s computer may not be able to detect when you’re applying the brakes.
Wiring issues
Another potential cause of the P1571 code is wiring issues. Over time, the wires in your vehicle’s brake pedal switch circuit can become corroded or damaged, which can cause the circuit to fail.
Computer system issues
In some cases, the code may be caused by a problem with your vehicle’s computer system. If the computer is not properly communicating with the brake pedal switch, it may not be able to detect when the brake pedal is depressed.
Which car models does the P1571 code affect the most?
The P1571 code can affect a wide range of car models, but it’s most commonly found in vehicles that use electronic throttle control systems. Some of the car models that are most affected by the code include:
- Acura TL: Some Acura TL models have been known to experience the P1571 code. This is because these vehicles use an immobilizer system that communicates with the engine control module through a dedicated circuit.
- Volkswagen Passat: Due to issues with the brake pedal switch’s power supply, some models of the Volkswagen Passat have been known to experience this code.
- Lexus LS400: Finally, the LS400 hybrid is known to face this code due to problems with the computer system and bad brake switch readings.
How to diagnose the P1571 code
Diagnosing this code properly means figuring out what’s causing it and that could be a more demanding task than it seems. We’ve talked to our team’s experts and mechanics to bring you a list of most commonly used diagnostic methods:
Check the brake pedal switch
The first thing you should do when diagnosing the P1571 code is to check the brake pedal switch. You can do this by using a multimeter to test the switch’s resistance. If the switch is faulty, you’ll need to replace it.
Check the wiring
If the brake pedal switch is not the issue, the next step is to check the wiring. You should visually inspect the wiring for any signs of damage or corrosion. If you find any issues, you’ll need to repair or replace the wiring.
Check the computer system
If the brake pedal switch and wiring are not the issue, the problem may be with your vehicle’s computer system. You’ll need to use a diagnostic tool to check for any error codes that may be present. If you find any issues, you may need to reflash or replace the computer system.
How to fix the P1571 code
Once you’ve identified the root cause of the P1571 code, you can start working on a fix. Here are some steps you can take to fix the code:
Replace the brake pedal switch
If the brake pedal switch is faulty, you’ll need to replace it. This is a relatively simple repair that can be completed in a few hours.
Repair or replace the wiring
This can be a more complex repair, but it’s still something that can be done with the right tools and expertise. You won’t have to pay more than around $100 on average to repair wiring issues and restore the balance of the brake pedal switch.
Reflash or replace the computer system
If the issue is with your vehicle’s computer system, you may need to reflash or replace the system. This is a more complex repair that should only be attempted by a trained professional.
How to prevent the P1571 code
Preventing the P1571 code is all about proper maintenance. Here are some preventative measures you can take:
- Keep your brake pedal switch clean
- Perform routine maintenance and brake checks
- Address any brake issues promptly
If you notice any issues with your vehicle, such as a loss of power or acceleration, you should address them promptly. This can help prevent larger issues from occurring down the road.
Our take
In the end, the P1571 code can be a serious issue that can compromise your safety on the road. However, with the right knowledge, tools, and expertise, it’s a problem that can be fixed.
By understanding what causes the code and how to diagnose and fix it, you can keep your vehicle running smoothly and safely.
How is the P1571 code diagnosed?
Diagnosing the P1571 code requires specialized equipment and expertise. A qualified mechanic or technician will typically use an OBD-II scanner to read the code and perform further diagnostic tests to determine the underlying cause of the issue.
What are the symptoms of the P1571 code?
The symptoms of the P1571 code can vary depending on the specific make and model of your vehicle. However, common symptoms include an engine that won’t start or starts and then stalls shortly after, a check engine light, and reduced performance.
How is the P1571 code repaired?
Repairing the P1571 code may involve replacing one or more components, such as the immobilizer control module, engine control module, or wiring. The exact repairs needed will depend on the underlying cause of the issue and should be performed by a qualified mechanic or technician.
