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Intelligent Access "Key Battery Low Replace Soon" message

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275K views 59 replies 37 participants last post by  wullscej  
Bad advice. Never "reset the computer" arbitrarily.
When does the error go away then if it doesn't turn off with a new battery? That's been the advice given by others who've had the same issue after changing the battery with no change in status.

E.x.

Since changing the batteries in the keyfobs didn't get rid of the message, I decided to disconnect the battery yesterday. I disconnected the positive terminal for a couple of minutes and then reconnected it. The message is now gone and everything is working correctly.
I haven't had this issue yet however.
 
Please read my previous reply.

I really don't like resetting all of the modules (especially the PCM) unless there is a compelling reason to do so.

Another alternative would be to pull the fuse for the module that needs resetting (i.e. MFT/Sync reset).
Pulling fuses didn't seem to work on my car for resetting the MFT, it would remove power from the affected sub-system and possibly cause it to reboot, however apart from one time when it seemed to forget the drive it was still not reset and went right back to the previous track after the crash. The fix then was to take a different USB drive when the original one that worked fine in the car with the basic sync system failed to index and caused MFT to go into a seizure/ reboot loop every time it was used.

Just copy and pasted the files onto a clean drive and it worked, some how the original one went bad even though the drive was fine.

I don't really like the idea of pulling the battery either, but that was something that works, and speeds up the process at the expense of potentially losing some of the keep alive memory for other systems you'd prefer not to reset.
 
The North American MK3 Focus is built in the USA, in Michigan at Ford's Michigan Assembly Plant, not Argentina. Global Focus production takes place there, in China, in Germany and in Thailand among other locales.