B1601 Code: PATS Received Incorrect Key Code

3 weeks agoLast Updated: August 9, 2026

0 2 1 minute read

Have you ever encountered the B1601 Code on your car’s dashboard? This code indicates that the Passive Anti-Theft System (PATS) received an Incorrect Key Code. In this article, we will delve into the details of this error code and what it means for your vehicle.

Table of Contents

Understanding the B1601 Code

The B1601 Code is specifically related to the PATS of your vehicle. The PATS is a security feature that prevents unauthorized access to your car by requiring a specific key code to start the engine. When the system detects an Incorrect Key Code, it triggers the B1601 error code.

Causes of the Incorrect Key Code

There are several reasons why the PATS may receive an Incorrect Key Code. It could be due to a faulty key fob, a damaged transponder, or a problem with the PATS module itself. In some cases, a dead battery in the key fob can also trigger the B1601 Code.

Diagnosing the Issue

If you encounter the B1601 Code, it is crucial to diagnose the issue accurately. A professional mechanic can use a diagnostic tool to read the error code and pinpoint the exact cause of the problem. They will then be able to determine the best course of action to resolve the issue.

Resolving the B1601 Code

Once the cause of the Incorrect Key Code is identified, the next step is to resolve the issue. This may involve reprogramming the key fob, replacing the transponder, or repairing the PATS module. It is essential to follow the manufacturer’s guidelines and use genuine parts to ensure the security of your vehicle.

Preventing Future Issues

To prevent the recurrence of the B1601 Code, it is essential to take good care of your key fob and ensure that it is in good working condition. Regular maintenance checks and replacing the key fob battery when necessary can help prevent issues with the PATS system.

Conclusion

In conclusion, the B1601 Code indicating an Incorrect Key Code in the PATS system of your vehicle should not be ignored. It is crucial to diagnose and resolve the issue promptly to ensure the security and functionality of your car. By following the manufacturer’s guidelines and maintaining your key fob, you can prevent future issues with the PATS system.