Battery charging question

The real answer depends on the precise situation at the moment.
But in general, if the engine needs to run for some other reason.....like to keep it up to good operating temperature......then the battery will be charging too.

What do you consider "bad MPG" ??

That depends on a lot of things too.
My C's have varied from a low around 40 to a high of maybe 65 but both of those extremes are pretty rare. I think my long term average might be somewhere around 50.

 

Pretty much. You can feather the throttle to a no use no charge situation.
If you want mpg help, post a detailed write up of your experience

 

I read somewhere that you should have the 12V DC Battery checked (not the HVB), because that has a life of about 3 years, and an early indicator of that is a lowered mileage.

There's a post on it right on this forum:

Weird stuff happening? MPGs dropping? Test The Battery

 

Did you buy it new?

How many miles on her?

Regular maintenance?

Tires pressure?

 

I never use that charging screen. One thing: it's VERY distracting: worse than texting.

 

has your driving situation changed at all?

are you tracking mpg's by the tankful figured manually at the pump?

might be worth testing the 12 volt battery

 

But.....have you checked that lately......and regularly through out the year ??

Has your driving route changed around Jan. 2018 ?

Have you changed where you buy gas ?

Have they started using ethanol in the gas in your area recently ??

Does the gas engine EVER shut off in normal driving and stopping ?

I suggest a shop visit because something might be going on that needs attention and it MIGHT still be covered under warranty.