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Computer Reset After Changing Battery?

battry computer reset

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4 replies to this topic

#1 OFFLINE   IFHP

IFHP

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Posted 11 August 2018 - 10:52 AM

I just changed the 12 volt battery on my '13 C-Max for the first time. It was a little bit of a challenge due to no mechanical latch on the back hatch door, but it worked out. The dealer has suggested that I bring the car in to have the computer reset (1/2 hour labor). I understand that some high end cars do require that the onboard computers be synced with an individual battery, but is that really necessary on a C-Max?  What are the risk if I don't do that? 









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#2 OFFLINE   homestead

homestead

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Posted 11 August 2018 - 11:39 AM

Yes its a good idea to have that done.  Car tracks the age of the battery affecting charging and how long the radio keeps playing after shutting off the car.

There are also tools you can get to do it yourself.  My dealer didn't charge for it and it took 5 minutes.


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#3 OFFLINE   ptjones

ptjones

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Posted 11 August 2018 - 11:49 AM

I changed mine and didn't bother to update the computer, if it was a real problem I would get it done or I would figure it out. :)

 

Paul



#4 OFFLINE   Plus 3 Golfer

Plus 3 Golfer

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Posted 11 August 2018 - 12:51 PM

I just changed the 12 volt battery on my '13 C-Max for the first time. It was a little bit of a challenge due to no mechanical latch on the back hatch door, but it worked out. The dealer has suggested that I bring the car in to have the computer reset (1/2 hour labor). I understand that some high end cars do require that the onboard computers be synced with an individual battery, but is that really necessary on a C-Max?  What are the risk if I don't do that? 

 

Get an ELM327 adapter (as low as $8 to $80 for one that can scan HS and MS modules automatically) and download the free Windows Forscan App to a windows tablet / laptop / PC and reset the 12V battery data.  I believe you have to request the extended license and Forscan will send a code to unlock the App.

 

It doesn't matter how much you pay for a car as to whether to reset the battery or not.  The charging and load shed algorithms need correct data to keep track of the State of Charge of the battery to hopefully maximize life of the battery.   If you feel paying 1/2 hour labor is too much, don't do it.  



#5 OFFLINE   IFHP

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Posted 12 August 2018 - 01:51 PM

Thank you. 








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