Those were my observations and the 12V battery was the only thing I changed at that time. It is hard to control all the variables. For example, lately my average mpg have dropped down into the mid to upper 40’s, but I am now driving in “normal” mode instead of “eco” mode like before, and I am no longer bothering use a hypermiling driving style as before.

I was told my bad abs module can wear out the auxiliary battery since it runs off the 12v instead of the traction battery. And if that’s the case then it will also decrease mpg. I’m just trying to figure out what to prioritize in fixing.