Dysfunctional after battery replacement

Asked by Aug 03, 2017 at 09:49 PM about the Ford Focus

Question type: Maintenance & Repair

Why is it that after replacing the battery nothing
works in my Ford Focus? The windshield wipers
don't turn on the windows don't go up and down
the AC doesn't work

4 Answers


It sounds like you failed to use the preset saver tool before disconnecting the main power supply, this tool plugs right into the OBD2 port and keeps the memory active until a new battery is installed. If this is the case then the only place that can reflash the vehicle is the dealer, runs about a hundred bucks for a reflash.

This is due to the Heads at Ford deciding to continually SCREW there Customers after Purchase.....example....for less than $5 enough on-board memory could have been installed/included in the Computer to allow for EASY BASIC MAINTENANCE of the Vehicle...this is what happens when the Turds are Nerds from Microsoft called Engineers!....So many fools so little knowledge....just look at the Windows System!


For anyone who is looking for help: I drive a 2012 ford focus. I just replaced the battery on my own since the battery crapped out at a park and wouldn't be jumped. Afterwards most things reset and the service request started popping up and the check engine light turned on along with having trouble accelerating and braking. I took it to a shop nearby and he reset the warnings and told me I have to keep my car in idle for 2 hours because it needs to properly reset after a battery change, he said if the lights turn back on that I should come back and it may be a 900 problem I am facing instead. Hopefully that's not the case but if you need some help in a similar situation try leaving your car for 2 hours in idle, he said it can reset if you drive around for two hours too but it's sketchy when the acceleration isn't working. I'm leaving my car for two hours in idle right now, will post results when I have them.

2 people found this helpful.

I just replaced my battery yesterday and all turned on alright. radio a/c. the only problem is a light went on saying something about transmisssion. Took it to Auto Zone the check it said it needed the Transmission Module Control. Car is having trouble shifting. I haven't driven for 2 hours. Got scared. I'm a woman and can't afford it to break down. What should I do.

1 people found this helpful.

Your Answer:


Looking for a Used Focus in your area?

CarGurus has 2,577 nationwide Focus listings starting at $1,934.

Postal Code:

Ford Focus Experts

  • #1
  • #2
    Su'ad Barakat
  • #3
View All

Related Models For Sale

Used Ford Fusion
36 Great Deals out of 1,876 listings starting at $1,500
Used Honda Civic
117 Great Deals out of 4,686 listings starting at $1,888
Used Ford Fiesta
17 Great Deals out of 658 listings starting at $2,999
Used Ford Focus RS
100 listings starting at $33,795
Used Chevrolet Cruze
73 Great Deals out of 6,915 listings starting at $2,993
Used Ford Mustang
62 Great Deals out of 1,554 listings starting at $2,900
Used Toyota Corolla
78 Great Deals out of 4,262 listings starting at $3,250
Used Ford Escape
121 Great Deals out of 7,127 listings starting at $1,200
Used Hyundai Elantra
96 Great Deals out of 4,398 listings starting at $1,830
Used Honda Accord
35 Great Deals out of 1,795 listings starting at $1,998
Used Mazda MAZDA3
64 Great Deals out of 3,684 listings starting at $2,499
Used Toyota Camry
27 Great Deals out of 1,954 listings starting at $1,750
Used Volkswagen GTI
25 Great Deals out of 292 listings starting at $5,428
Used Nissan Altima
36 Great Deals out of 1,343 listings starting at $1,995
Used Chevrolet Malibu
34 Great Deals out of 1,794 listings starting at $2,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.