Gas Mileage Reduction-Help!

[marknj]

I replaced my battery and now my mpg has dropped from mid 20s to low to mid teens. After installing battery my dashboard indicator went from mileage range of 400 to 300. The indicator shows 13 MPG and this was confirmed with recent fillup.

Check engine light is not on but is working. I also noticed that my rear window, defogger and wiper and washer was not working. From another thread I discovered that the window had to be reset. Wiper and window now work well thanks to the poster's advice.

Does something else need to be reset? I realize it is cold here but it has been cold before and MPG has always been in the 20s.

 

[jonesmw10]

I'd attribute a decent chunk of that to the ridiculously cold weather. I've taken a huge hit on MPGs with it being as cold as it is... My last fill up was about 13 mpg, but I usually get about 17. I also think I may have a brake caliper that is hanging up, which could attribute to it. Food for thought.

 

[marknj]

Disregard My Request For Help

I found the answer to my problem in another thread. The Euc or ecu needs about 500 miles to relearn and calculate consumption.

 

[marknj]

Thanks!

Thanksfor the info jonesmw10