State of charge 12v battery low issue

[Lippy]

I was traveling for a week. I noticed in FordPass while I was away the truck went into deep sleep mode after only about 2-3 days of not being driven. When I returned and started the truck this morning, I got an error on the main dash cluster that said "State of charge 12v battery low." The truck drove fine, but when I stopped it the large screen showed the following message (below). That issue eventually went away. I obviously shouldn't have this problem after only a week. I already received the OTA upgrade that addressed phantom drain, so I'm wondering if that damaged the battery before it was fixed.

Is anyone else still having these problems? Any thoughts are appreciated.

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[Micelda]

I was traveling for a week. I noticed in FordPass while I was away the truck went into deep sleep mode after only about 2-3 days of not being driven. When I returned and started the truck this morning, I got an error on the main dash cluster that said "State of charge 12v battery low." The truck drove fine, but when I stopped it the large screen showed the following message (below). That issue eventually went away. I obviously shouldn't have this problem after only a week. I already received the OTA upgrade that addressed phantom drain, so I'm wondering if that damaged the battery before it was fixed.

Is anyone else still having these problems? Any thoughts are appreciated.

So I am getting a truck in Deep Sleep mode after I haven’t touched the tuck for 3+ days. It’s happened 2x now when I come back from a trip. I see this message in the app, but never see anything on the screen.

 

[JEB]

I just saw something very similar. My truck went into deep sleep mode Thursday night (not the first time) after sitting in my garage for less than a day. I checked the battery with a multimeter and saw only 12v. WTF! Threw a battery charger on it and let the battery charge back up overnight. When I started the truck up this morning, I got a Service Charging System warning. I dismissed it and drove around for awhile, stopped and restarted a couple of times, and it did not return. When I got home, I used FORScan to check for DTCs and found an inactive one stored under the Body Control Module—B11D9:09-08. This Code translates to Vehicle Battery: Component Failure.

I also suspect that my battery is damaged. It was manufactured 3/29 according to OASIS, which is after the date of the phantom battery draw problem which affected units built on or before 3/16. But my truck sat around on some lot (probably waiting for a chip) until July when it was finally delivered to the dealer. Certainly not good for the battery. I have an appointment with my dealer in two weeks. A bad battery might explain other issues I’ve been seeing, e.g. periodic modem disconnects.

 

[7cbreeze]

I just saw something very similar. My truck went into deep sleep mode Thursday night (not the first time) after sitting in my garage for less than a day. I checked the battery with a multimeter and saw only 12v. WTF! Threw a battery charger on it and let the battery charge back up overnight. When I started the truck up this morning, I got a Service Charging System warning. I dismissed it and drove around for awhile, stopped and restarted a couple of times, and it did not return. When I got home, I used FORScan to check for DTCs and found an inactive one stored under the Body Control Module—B11D9:09-08. This Code translates to Vehicle Battery: Component Failure.

I also suspect that my battery is damaged. It was manufactured 3/29 according to OASIS, which is after the date of the phantom battery draw problem which affected units built on or before 3/16. But my truck sat around on some lot (probably waiting for a chip) until July when it was finally delivered to the dealer. Certainly not good for the battery. I have an appointment with my dealer in two weeks. A bad battery might explain other issues I’ve been seeing, e.g. periodic modem disconnects.

Bingo on the battery
Having a power boost the battery is charged by the lit ion battery , engine on 12.91 v engine cycle off 12.9 v , was reading that the power boost needs a deep reserve of power. I installed a set of window rain guards in channel , they required to move the windows up and down 5 times to seat properly.
No problem. I started the truck up to go to the store several hours and message after message about low voltage, component failure , service vehicle soon.. The truck stayed on even when warm at stop lights to charge the battery.. The Next day after a cool night { In the 40s} I started the truck and a low battery condition showed up . Truck was running poorly . So I installed my new Odyssey battery that I was condition mode .. everything is roses, touch screen is fast again , truck fires right up. fuel millage increase, ect.
Took the Old battery from my new truck { Mid July delivery 21 } and put it on the charger. It was half charged.. to fully Charge it took over 8 hrs on the Odyssey 20 amp charger. let the battery sit for 24 hours not connected to anything , put the charger to it and it was down 60 percent .. Taking the battery back to ford this week for a credit.
Moral of story.. Get the best Battery you can and your electronics will love you for it. Sadly the gsm Battery ford installs with this Truck is a step up its still a piece of crap..I fell for the guys in really cold Climates with this battery,,

 

[JEB]

Bingo on the battery
Having a power boost the battery is charged by the lit ion battery , engine on 12.91 v engine cycle off 12.9 v , was reading that the power boost needs a deep reserve of power. I installed a set of window rain guards in channel , they required to move the windows up and down 5 times to seat properly.
No problem. I started the truck up to go to the store several hours and message after message about low voltage, component failure , service vehicle soon.. The truck stayed on even when warm at stop lights to charge the battery.. The Next day after a cool night { In the 40s} I started the truck and a low battery condition showed up . Truck was running poorly . So I installed my new Odyssey battery that I was condition mode .. everything is roses, touch screen is fast again , truck fires right up. fuel millage increase, ect.
Took the Old battery from my new truck { Mid July delivery 21 } and put it on the charger. It was half charged.. to fully Charge it took over 8 hrs on the Odyssey 20 amp charger. let the battery sit for 24 hours not connected to anything , put the charger to it and it was down 60 percent .. Taking the battery back to ford this week for a credit.
Moral of story.. Get the best Battery you can and your electronics will love you for it. Sadly the gsm Battery ford installs with this Truck is a step up its still a piece of crap..I fell for the guys in really cold Climates with this battery,,

Well, I’m not sure the Motorcraft AGM batteries are quite as bad as crap—they are made by Johnson Controls, which also makes Interstate—but no, they aren’t Odysseys either. That is a really nice battery. But even good AGM batteries can’t just sit around for months without being charged and come back good as new. There’s bound to be damage. That’s what I think is my really problem.

In any event, you still might want to put that Odyssey on a charger periodically. One problem with car and truck charging systems is that they are always set up for the lowest common denominator—flooded batteries. To avoid cooking flooded batteries, most auto manufacturers set the charging voltage too low to properly charge an AGM so an AGM never gets that really hard charge that keeps them health and happy over the long haul. I’m not sure Ford did this with the PB, but I wouldn’t risk regular undercharging with a $300 AGM like an Odyssey.

 

[7cbreeze]

Well the battery ford put in the powerboost is not quite up to the task. A little adverse conditions puts it over the edge of it capacity , not good, i meant to say crap for the application . My truck does get used as a Light Truck every now and again.. washboard roads, minus 20 in Wyoming , the heat of Death valley. Its safe to say that the battery they installed with those trucks are at best marginal for the usage ..most likely a bean counter move. My power boost charges at 12.9v . The Odyssey I had on the 11 f350 lasted 8 years and 140k . I took the batteries out every year and did a refresh charge using the odyssey charger..
Its been my experience That electronics really dislike 1] low voltage 2] Vibration 3] Heat 4] moisture .2 is controlled at building, as is 4. 3 is done by engineering the tolerance . but 1 thats a stickler. so the software guys put in the fix by shutdown of systems in order to prevent a #3 issue.. Iam currently trying to figure out how to install a second battery ,,, Stay safe

 

[Bryan Simon]

Is anyone else still having these problems? Any thoughts are appreciated.

I get this about three times every morning.
I get to my work parking lot about 90 minutes before going in.
(me time with no interuptions)
Listen to stereo and about every 25 min, this shows up on my 8” display.
turn key off, turn key back on and I’m good for another 25 min.

never have gotten a deep sleep message, but I have an XLT 301a without all the “goodies”

 

[JEB]

My power boost charges at 12.9v .

You confirmed that? If that’s true, then that’s a huge problem and just getting a better battery would only be a temporary fix. 12.9V is way too low to recharge properly any starting battery let alone an AGM. 12.9V will recharge the battery eventually, sort of, after a long drive but it does nothing to keep the battery at its optimal capacity. It will wear out long before it should. Any decent battery charger will charge AGMs at 14.7-14.8V. Even my old Colorado charged at above 14V.

I really hope you aren’t right about that voltage but very good to know if you are.

 

[7cbreeze]

You confirmed that? If that’s true, then that’s a huge problem and just getting a better battery would only be a temporary fix. 12.9V is way too low to recharge properly any starting battery let alone an AGM. 12.9V will recharge the battery eventually, sort of, after a long drive but it does nothing to keep the battery at its optimal capacity. It will wear out long before it should. Any decent battery charger will charge AGMs at 14.7-14.8V. Even my old Colorado charged at above 14V.

I really hope you aren’t right about that voltage but very good to know if you are.

Well this morning i went out fired up the truck with meter on . Engine Idle 1k cold V was 13.2 then 12.91/12.92 made RPM to 1200 voltage was 15.3 and stable. Engine off cycle in Hybrid mode V was 12.91... These conditions were done with a cold engine.. Moving down the road I suspect the V would be Higher as needed

 

[JEB]

Well this morning i went out fired up the truck with meter on . Engine Idle 1k cold V was 13.2 then 12.91/12.92 made RPM to 1200 voltage was 15.3 and stable. Engine off cycle in Hybrid mode V was 12.91... These conditions were done with a cold engine.. Moving down the road I suspect the V would be Higher as needed

Those numbers make much more sense. I would expect 12.9 immediately after the alternator shuts down in EV mode. 13.2 is a float voltage. Consistent with the engine at idle. 15.3 is higher than I’d expect at higher RPMs when the engine is running but a lot more reasonable than 12.9. Thanks for sleuthing this.

How has that Odyssey been working? I’m having increasingly concerning electrical issues on my end with the stock battery. Repeated “Service Charging System” warnings when first starting up in the morning, stored DTC indicating a battery-related issue, and now my truck goes into “deep sleep” mode after sitting in my garage for only an hour. Battery maintainer/charger does not prevent entry into deep sleep. Took the truck to my dealer, they confirmed the DTC, but the battery tested fine so they put a call into Ford engineering for further guidance. No joy so far. Really unfortunate because the “phantom battery drain” earlier this year was supposed to have been fixed, in part by updating the GWM. Power Up 2.1.0 recently updated the GWM again.

 

[Bryan Simon]

Well this morning i went out fired up the truck with meter on . Engine Idle 1k cold V was 13.2 then 12.91/12.92 made RPM to 1200 voltage was 15.3 and stable. Engine off cycle in Hybrid mode V was 12.91... These conditions were done with a cold engine.. Moving down the road I suspect the V would be Higher as needed

anything below 13vdc is essentially just reading current battery voltage.
The alternator has to be spinning at a certain speed before it actually “turns on”.
1200-1500 engine rpm is about where any alternator ”turns on”.
15-16vdc is a bit high, but I don’t believe it will hurt anything.
(my 79 Chev ran at 16v for over 30 years with no issues)
Optimal voltage ( or perhaps design voltage for most all accessories) is right at 14.2vdc
My Falcon hangs at 15 at most times, till the electric fan kicks on.
(late model Ford internally regulated serpentine alternator)
The 66 ElCamino, hard pressed to deliver 14 at cruise, but it has never dropped below 13.8. (Also late model serpentine alternator @100amp)

 

[tonesto7]

Mine started dying on November 17th. It started when the 1.7.1 OTA power-up started downloading and failed. It's only partially installed and I've had to start the truck every day. I even tried updating my APIM module using FRDS. But it won't even read the files from the USB

 

[JEB]

Mine started dying on November 17th. It started when the 1.7.1 OTA power-up started downloading and failed. It's only partially installed and I've had to start the truck every day. I even tried updating my APIM module using FRDS. But it won't even read the files from the USB

Does your truck have an auxiliary 12v battery? It’s a small 12v AGM battery that has a capacity of 7.5Ah and it’s located under the passenger side back seat. Early on, some folks speculated that it was related to the inverter but actually it’s a supplemental power source designed to provide power for “transient” loads that the starting battery can’t handle during events like cranking. I think it also provides power to systems when the truck isn’t running, like the TCU/Modem, that receives OTA updates during the overnight hours. That’s where my dealer is focusing its attention for the electrical problems I’ve been having. I don’t know if this aux AGM battery is a Powerboost-only system or not but I know it’s NOT part of the hybrid’s lithium battery bank—too small, different chemistry. Might be worth a look.

 

[tonesto7]

Does your truck have an auxiliary 12v battery? It’s a small 12v AGM battery that has a capacity of 7.5Ah and it’s located under the passenger side back seat. Early on, some folks speculated that it was related to the inverter but actually it’s a supplemental power source designed to provide power for “transient” loads that the starting battery can’t handle during events like cranking. I think it also provides power to systems when the truck isn’t running, like the TCU/Modem, that receives OTA updates during the overnight hours. That’s where my dealer is focusing its attention for the electrical problems I’ve been having. I don’t know if this aux AGM battery is a Powerboost-only system or not but I know it’s NOT part of the hybrid’s lithium battery bank—too small, different chemistry. Might be worth a look.

Nope. I don’t have a power boost or pro- power

 

[SonnyDigs]

I get this about three times every morning.
I get to my work parking lot about 90 minutes before going in.
(me time with no interuptions)
Listen to stereo and about every 25 min, this shows up on my 8” display.
turn key off, turn key back on and I’m good for another 25 min.

never have gotten a deep sleep message, but I have an XLT 301a without all the “goodies”

I purchased my truck 12/18/2020..
I keep getting the Deep Sleep Mode message on Ford pass.
Says start manually to clear message.
That never works.
I've uninstalled app.
I've removed vehicle from app and added it back.
I've started the truck a number of times.
Nothing gets rid of it.
I'm guessing early build it's a bad battery, any ideas??
Dealer wants me to drop it off for it to sit there for 2 to 5 days.
that's total BS!
5.0 V8

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