The turn signal sound is generated by a speaker or piezo buzzer in the instrument cluster. But it could be a BCM issue, or the system needs to be updated. I would try a hard system reboot to see if that helps, this guide can show you how:
https://www.2carpros.com/articles/step-by-step-guide-performing-a-hard-system-reboot-for-your-vehicles-electronics-systems
If this does not help, I would do a CAN scan. You can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.
Here is a video to show you how:
https://youtu.be/u-4syLc-ifQ
Please go over these guides and get back to us.
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Monday, December 2nd, 2024 AT 10:30 AM