12V Battery Deep Sleep Mode

[Hack]

'May be old, old ground. Sorry.

My 2022 Lariat Hybrid 12v battery is in deep sleep mode all the time. I have been getting these deep sleep messages for over a year, although it has always started. A few days ago I measured the voltage and it was 12.29 volts - nowhere near fully charged. I put a good charger on it and, after it said it was fully charged, I measured well over 13V. I turned the car on for a few minutes and, after turning it off measured - 12.29V. (It would be interesting to disconnect the cables at the battery and measure the unloaded voltage at the battery terminals. I may do that.)

I have read a bunch of articles in this forum and still don't know, is it the battery or the software/electronics? Does anyone know? I would be willing to replace the battery (not with a Ford battery). But if the problem is with the software or electronics, that won't help.

BTW - my truck is out of the 36k/3 year warrantee.

Thanks in advance.

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[Waterick]

It's both; too small a battery for today's demands and a Battery Management System designed around Corporate Average Fuel Economy standards that trades battery life for fuel economy.
Quite frankly, if you're out of your 3/36, you've done well compared to many here. That's good and bad because you had no reason for Ford to provide SSM's or new batteries at no charge, however you still have a deteriorating battery at three years. Some would say that's to be expected in this age of all the connectivity. Ford's BMS software does not help either, as it does not routinely keep the 12v battery fully charged. At this point, I would get the largest capacity AGM battery that fits as a replacement. Look at the various threads and posts on here to see what the options are. Maybe, (doubtful) Ford will one day address the BMS issue.

 

[Codestar7]

My 24 Mav's not really a year old yet, and I was getting these sleep warnings on my phone all the time. I didn't mess around. I have some kind of 5 year blue ribbon warrantee, it's supposed to cover everything. I took it in to ford and they said no problem. They hooked it to a huge diagnostic machine that ran every kind of test you could think of. Bottom line, they replaced it with a lithium battery. I was a mechanic for a while back in the 70's, so after I got home, I popped the hood to take a look, couldn't even find it. Anyone know where they hide the battery these days? Long story short, no more warnings. I wasn't aware they made lithium car batteries.

 

[rknrbt]

My 24 Mav's not really a year old yet, and I was getting these sleep warnings on my phone all the time. I didn't mess around. I have some kind of 5 year blue ribbon warrantee, it's supposed to cover everything. I took it in to ford and they said no problem. They hooked it to a huge diagnostic machine that ran every kind of test you could think of. Bottom line, they replaced it with a lithium battery. I was a mechanic for a while back in the 70's, so after I got home, I popped the hood to take a look, couldn't even find it. Anyone know where they hide the battery these days? Long story short, no more warnings. I wasn't aware they made lithium car batteries.

The battery on the hybrids is located under the rear passenger seat.

 

[Hack]

It's both; too small a battery for today's demands and a Battery Management System designed around Corporate Average Fuel Economy standards that trades battery life for fuel economy.
Quite frankly, if you're out of your 3/36, you've done well compared to many here. That's good and bad because you had no reason for Ford to provide SSM's or new batteries at no charge, however you still have a deteriorating battery at three years. Some would say that's to be expected in this age of all the connectivity. Ford's BMS software does not help either, as it does not routinely keep the 12v battery fully charged. At this point, I would get the largest capacity AGM battery that fits as a replacement. Look at the various threads and posts on here to see what the options are. Maybe, (doubtful) Ford will one day address the BMS issue.

Good info. Thanks, Richard.

 

[Codestar7]

The battery on the hybrids is located under the rear passenger seat.

Cool, found it! Neet, the way the seat has a pull handle and pops right up. Some odd stuff in the other well. Looks like a pour spout and some Ford cable. While I got your attention, there's a cigarette lighter port, and it looks like a hanger for something? Anyone. Also, my cloth upholstery has a zipper, I wonder if it's for washing or just installation.

 

[BlueSpec1]

Cool, found it! Neet, the way the seat has a pull handle and pops right up. Some odd stuff in the other well. Looks like a pour spout and some Ford cable. While I got your attention, there's a cigarette lighter port, and it looks like a hanger for something? Anyone. Also, my cloth upholstery has a zipper, I wonder if it's for washing or just installation.

The battery is an AGM.

The hanger slot is Ford Integrated Tether System (FITS) for Ford or other accessories like cup holder, trash bin, etc. https://www.mavericktruckclub.com/forum/threads/console-in-my-2025-maverick-xlt.71109/#post-1175463

The cable is for the bed where Ford left 12V harness ends. where could connect 12V or USB outlets
https://www.mavericktruckclub.com/f...rger-hp-by-maverick-innovation-designs.72228/

 

[Waterick]

Cool, found it! Neet, the way the seat has a pull handle and pops right up. Some odd stuff in the other well. Looks like a pour spout and some Ford cable. While I got your attention, there's a cigarette lighter port, and it looks like a hanger for something? Anyone. Also, my cloth upholstery has a zipper, I wonder if it's for washing or just installation.

That pour spout is the funnel you will need if you ever need to add gas to your fuel tank. Made to fit the capless filler.

 

[HeyBales]

My 24 Mav's not really a year old yet, and I was getting these sleep warnings on my phone all the time. I didn't mess around. I have some kind of 5 year blue ribbon warrantee, it's supposed to cover everything. I took it in to ford and they said no problem. They hooked it to a huge diagnostic machine that ran every kind of test you could think of. Bottom line, they replaced it with a lithium battery. I was a mechanic for a while back in the 70's, so after I got home, I popped the hood to take a look, couldn't even find it. Anyone know where they hide the battery these days? Long story short, no more warnings. I wasn't aware they made lithium car batteries.

You weren't given a lithium battery.
Which probably couldn't even be charged correctly.

 

[DWV]

Your battery is an AGM, says so right on top; it is not "lithium".

 

[Matso]

A little tip regarding the pour spout. You can easily knock out those fins on the inside of the funnel and you'll get a higher flow rate. No more splash out when I first tip the gas can over.

 

[Shelbyv8]

Ford does have a software update that charges the battery to 13 volts.

 

[Matso]

To Hack, since the battery saver mode (aka deep sleep) has been a known issue since they began production of the hybrid, I think it may be worth a shot to plead a warranty case with your dealer even though it has expired. You have nothing to lose by trying.

 

[Cherokee]

Ford does have a software update that charges the battery to 13 volts.

My 24 Ecoboost’s Factory AGM fully charges.
Only eight months of ownership and I have not seen sleep mode, even after a two week sit in freezing weather.
I’d suspect there is an update you missed.
I keep my auto update enabled so I can Fagetaboutit:’P

 

[Matso]

It's exclusively a hybrid issue.

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