Hold light flashing?

Hello, I'm Danny.

The first thing you need to do is retrieve the check engine light and hold code that is stored in your vehicles computer. Here is a tutorial showing how to check diagnostic CAN codes stored in your vehicle. A CAN scan will retrieve all codes stored in all your vehicles systems.

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Once you perform this procedure let us know the code numbers or information and we can then properly diagnose your vehicles issues. Hope this helps and thanks for using 2CarPros.