"12-volt battery fault - Service soon"

[Dude]

Which condition(s) trigger the "12-volt battery fault - Service soon". That message appeared this am on the vehicle display this AM. Performance has been nominal. Do you think the message is an anomaly?

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[joebruin77]

That could be a sign that your 12V battery is on its way out. Although I have not experienced that message in my MME, I did have a similar message in my 2018 Tesla and a week later, the battery was completely dead. So if I were you, I would drop by your Ford dealership and have them check the 12v battery.

 

[Mach-Lee]

Which condition(s) trigger the "12-volt battery fault - Service soon". That message appeared this am on the vehicle display this AM. Performance has been nominal. Do you think the message is an anomaly?

You don't need to do anything unless the message happens again soon. If it does, then see my topic for ideas:

https://www.macheforum.com/site/threads/how-to-recondition-service-your-12v-battery.11069/

 

[UCF_2004]

Which condition(s) trigger the "12-volt battery fault - Service soon". That message appeared this am on the vehicle display this AM. Performance has been nominal. Do you think the message is an anomaly?

Are you using any third party charging apps or electricity provider monitoring for discounts? I had this message every morning because a third party was pinging my modem several times an hour to gather charge and usage data for Duke Energy. Went away when I cut them off. If you aren't sure then change your Fordpass password and that will cut off any third party apps.

 

[Dude]

I am not using any third party apps. I did encounter an orange/amber indicator on the charging port after the previous nights charging session. I charge every night between 9 PM and 6 AM. On the morning of the incident I had inadvertently omitted charging that evening/night before the "12-volt fault" incident. We went out for a ride yesterday to give the battery a charge. There were no warning lights or messages acquired today. My horse appears to be in its usual state of health. This event seems mysterious to me but not troubling. The fault messages do not supply the user with any useful data. Similar to the idiot lights of older automobiles. So much to learn about the" BEV" and so little time. Thanks for your help.

 

[Dude]

12 volt battery appears to be "status quo".

 

[Mach-Lee]

I am not using any third party apps. I did encounter an orange/amber indicator on the charging port after the previous nights charging session. I charge every night between 9 PM and 6 AM. On the morning of the incident I had inadvertently omitted charging that evening/night before the "12-volt fault" incident. We went out for a ride yesterday to give the battery a charge. There were no warning lights or messages acquired today. My horse appears to be in its usual state of health. This event seems mysterious to me but not troubling. The fault messages do not supply the user with any useful data. Similar to the idiot lights of older automobiles. So much to learn about the" BEV" and so little time. Thanks for your help.

Charge error caused it, amber charge port light puts the car into a fault state and the 12V drains. If that error happens again you need to investigate and fix it. Probably a bad EVSE or charge port.

 

[Dude]

I took a brief trip to Peterborough, New Hampshire. Departed on Sunday @ 10AM and returned home by 8PM. My Mustang Mach e was left behind in the garage unplugged. Upon returning home I powered up and the "12 Volt Fault - Service Soon" indication appeared. I then powered off the BEV and plugged in. The charging parameter times are set to initiate @ 8PM daily and on weekends. The charging to 90% SOC started immediately. I powered up and the "12 Volt Fault - Service Soon" did not rear its ugly head again. I then powered my Mustang off and retreated to my humble abode. The following morning the Mach e appeared in its usual state of health. We went out for a ride and all systems appeared nominal. Any thoughts on this most recent event?

 

[Mach-Lee]

I took a brief trip to Peterborough, New Hampshire. Departed on Sunday @ 10AM and returned home by 8PM. My Mustang Mach e was left behind in the garage unplugged. Upon returning home I powered up and the "12 Volt Fault - Service Soon" indication appeared. I then powered off the BEV and plugged in. The charging parameter times are set to initiate @ 8PM daily and on weekends. The charging to 90% SOC started immediately. I powered up and the "12 Volt Fault - Service Soon" did not rear its ugly head again. I then powered my Mustang off and retreated to my humble abode. The following morning the Mach e appeared in its usual state of health. We went out for a ride and all systems appeared nominal. Any thoughts on this most recent event?

OK, let's do the checklist:

-No widgets, apps, or 3rd party programs using your FordPass account including, Scriptable widget, Recurrent, Optiwatt, or utility-controlled charging programs.

-Welcome lighting is turned off

-No hard-wired accessories including dashcams or radar detectors

-Nothing plugged into the OBD-II port under the dash

-Parked with all windows and doors closed

-No one is opening doors or trunk while the car is sitting

 

[Dude]

I am currently enrolled in the Eversource - which is our New England regional electric supplier - "Connecticut EV Charging Program" which utilizes the telematic capabilities of my EV to block charging at predetermined high demand periods. HMMMM. Could that be the root cause of the unexplained "12 Volt Battery Fault - Service Soon"?

 

[imstriker]

Mine started this about 2.5 weeks ago too. Took it to the dealer, tested battery, said it was fine. It continues to happen every few days. I do use the Android widget so I suppose that could be involved although I have been using it a long time. I'm not really worrying about it unless it becomes more frequent and then I'll take it back.

 

[SuperRob]

I am currently enrolled in the Eversource - which is our New England regional electric supplier - "Connecticut EV Charging Program" which utilizes the telematic capabilities of my EV to block charging at predetermined high demand periods. HMMMM. Could that be the root cause of the unexplained "12 Volt Battery Fault - Service Soon"?

Yes, they are likely pinging your car’s modem too much and draining the battery. if you aren’t driving the car enough to have the HVB charge the 12V, you can expect some drain on the 12V.

 

[Mach-Lee]

I am currently enrolled in the Eversource - which is our New England regional electric supplier - "Connecticut EV Charging Program" which utilizes the telematic capabilities of my EV to block charging at predetermined high demand periods. HMMMM. Could that be the root cause of the unexplained "12 Volt Battery Fault - Service Soon"?

Yes, that is likely the cause, others have had the same problem. They are pinging the car too often so it won't sleep. Unenroll from the program and/or change your FordPass password.

 

[Dude]

thank you vor your help

 

[Illinibird]

I went to start my car this morning and got the 12 volt battery fault - service soon message. It was sitting all night unplugged and had a 70% SOC. The car started up and I took it to the place I was going with no problems. When I reached my destination, I plugged in my 12 volt battery meter in the 12 volt receptacle in the center console storage box which displayed an amber light (has green, amber and red) and the voltage was 14.5 on the LED display. Usually at this voltage I get a green light and I've never had this amber light come on. When I returned to the car it started up fine with no error message. I have received several times over the past months a warning on the big screen that things were shut down to conserve battery power but the car always started right up. I DO have the Recurrent software; no cameras or any other electrical additions to the car. The welcome pony lights do come on when I go out to the garage. I have no outside electricity carriers/service (no pinging) and my charging port always shows blue lights when the AC charger is plugged in.

Because I know that if ones 12 volt battery fails to work the car is essentially bricked until a new one is installed or the car is jumped I was very concerned and I immediately dropped it off at my dealer on the way home where it is now.

Will they see this error code I received this morning? What do you think is causing this? How do they check ones 12 volt AGM battery to see if it is good or needs to be replaced? I read about sulfonation (sp?) of the plates and am wondering if this is the cause. Would the dealer go through the process discussed to restore the 12 volt battery?

EDIT: I just removed the "Recurrent" HV battery program monitoring my car.

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