What is a code P3177?

This code refers to the charger or battery operation, but the first thing that can be wrong is the regular 12-volt battery being bad. I have included the entire trouble tree in the diagrams below, but I think we should test the surface voltage of the 12-volt battery.

Here is a guide to help you test it and the battery location in the diagrams below as well:

https://www.2carpros.com/articles/how-to-use-a-voltmeter

Check out the diagrams (below). Please let us know what you find. We are very interested to see what it is.