Hybrid Deep Sleep issue solved! Bad battery was my cause

[Silver23]

On 10/26/23 I had 23E09 power train recall done on my lariat 12v been showing 11.9-12.1v in accessory (push start button and truck goes to ready showing 14.8 before recall after recall shows 15.3-15.5) then push start button to turn ready off now in accessory. Turn off all possible 12v and dash power point monitor shows on 7th day and 270 miles at 12.8v which did not drop for 3-4 minutes. 23E09 apparently updates setting for BMS ???

That is not a battery related recall though...

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[jsus]

That is not a battery related recall though...

23E09 updates the PCM, BECM, SOBDM, SOBDM-C, and ABS modules - it's really just a general update of various powertrain modules to the latest versions. Could definitely have an impact on charging the 12V battery, even if the BMS is untouched, though even that could be included, just not called out.

Recall 23E07 and TSBs 23-2059/2060 follow the same update procedure.

Saw this posted on another site and didn’t see it posted here yet.

 

[MakinDoForNow]

That is not a battery related recall though...

I didn't think so but lots of stuff is acting different. One big difference is the 12v bus as viewed at the dash power point is spending much much more time above 15.3volts. whatever may be causing that potentially may allow faster charging or keeping available current stronger at the 12v battery. I'll know in a month or so if the overnight voltage drop does or does not drop to 11.9-12.1. I suspect that my 12v is somewhat sulphated at 20 months of usage.
Also 23E09 has apparently improved mpg as reported by dash at about 3mpg. But only have 300 miles on Maverick since so to early to say for certain.

 

[Silver23]

I didn't think so but lots of stuff is acting different. One big difference is the 12v bus as viewed at the dash power point is spending much much more time above 15.3volts. whatever may be causing that potentially may allow faster charging or keeping available current stronger at the 12v battery. I'll know in a month or so if the overnight voltage drop does or does not drop to 11.9-12.1. I suspect that my 12v is somewhat sulphated at 20 months of usage.

interesting. I guess it could be the system trying harder to charge the battery because it's sulfated?
It would be interesting to compare the module's battery settings with my 2023 hybrid's.

 

[MakinDoForNow]

interesting. I guess it could be the system trying harder to charge the battery because it's sulfated?
It would be interesting to compare the module's battery settings with my 2023 hybrid's.

About five weeks ago dealership reported my CCA was down to 411 from "new" rated 470. Wouldn't it be nice IF BMS had repair sulfate mode? I am reluctant to put my noco in warranty period and also don't know if repair needs to be done with battery not connected to vehicle.
Also I think a sulfated battery would just charge to the fully charge voltage sooner since it is working with fewer available plate capacity. Reserve just wouldn't be there. At least until one cell completely dies.

 

[icegradner]

23E09 updates the PCM, BECM, SOBDM, SOBDM-C, and ABS modules - it's really just a general update of various powertrain modules to the latest versions. Could definitely have an impact on charging the 12V battery, even if the BMS is untouched, though even that could be included, just not called out.

Recall 23E07 and TSBs 23-2059/2060 follow the same update procedure.

Yup. I just got this update a few days ago and noticed a lot of difference. Seems like over all the electrical system is improved.

 

[Chopperbobc]

" They discovered that it was simply a bad battery and was probably caused by the truck sitting for long periods of time between manufacture and delivery to the dealership."

Does that seem strange to anyone else, or just me? It's a 2023 in incredibly high demand. How long could it have possibly been sitting somewhere?

Clearly the battery was the problem, since replacing it resolved the issue; but could it really have been from just sitting somewhere for a couple of weeks or months? I'm thinking it was just a battery gone bad...no other explanation needed.

Went through 2 new batteries and 5 months later, I still got 28 deep sleep notices from Ford. Last one was this morning at 9-53 am

 

[ClemsonU88]

Went through 2 new batteries and 5 months later, I still got 28 deep sleep notices from Ford. Last one was this morning at 9-53 am

So yours WASN'T just the battery. It appears to be something causing the battery to go bad.

The original poster's issue was solved by replacing the battery, but a battery shouldn't go bad just by sitting idle for a month or two. Something else would need to contribute to the problem (or the battery was bad when they built the truck).

 

[computerpulse]

I've had my 2023 Mav Hybrid for almost two months. About a couple weeks in I started getting FordPass notifications here and there saying the app was disabled due to the truck ging into "battery saver mode". It advised to simply drive the truck and the app would reset.

That worked...at first. The app started giving me more frequent notifications about battery saver mode. The last few days I'd gotten the "deep sleep" notification after each trip whether long or short so I immediately took it into my local dealer.

They discovered that it was simply a bad battery and was probably caused by the truck sitting for long periods of time between manufacture and delivery to the dealership.

Sooo, for those of you out there who may have had this issue and haven't read posts about it on this forum yet...let the dealer know to (a) test the 12v battery (b) the charging system and (c) the wiring harness to the 12v battery. From reading similar experiences on this site I knew to ask those questions and get these areas examined. To all those who have posted this sound advice before me...thanks very much!

I’m having the same issue, but ford dealership says everything is fine. If I were to replace my battery anyway, what’s anyone’s recommendation?

 

[computerpulse]

Went through 2 new batteries and 5 months later, I still got 28 deep sleep notices from Ford. Last one was this morning at 9-53 am

We’ll have you figured anything out?

 

[Inverted]

We’ll have you figured anything out?

I will chime in on my experience. I had my 2023 XLT lux hybrid for about 6 months before it went into deep sleep mode and I had to jump it (3/23 to 9/23). It had set for about 4 days. They tried to tell me "Texas heat" blah blah. I have lived here for 45 years and never had a new battery die in 4 days. Anyways, they warrantied the battery, and everything seemed fine....until today. I have been off since last Wednesday night, so once again the vehicle sat for 5 days and low and behold, I just got a deep sleep alert. At least the app warned me this time. Went out and it started and I took it for a 20 minute drive. So like the OP, they thought it was the battery...and changing did help for a while, but then again my vehicle never sits long...but the 2 times it has it has gone into deep sleep (once with the battery entirely dead). Another thing I notice is my truck never auto stop/starts. I know it's hard to tell with hybrids sometimes, but I distinctly remember after the battery was replaced that it would for a few weeks or a month....but I can't remember the last time I noticed it auto stop/start. This ain't a battery issue...something else.

 

[Packer Bill]

I will chime in on my experience. I had my 2023 XLT lux hybrid for about 6 months before it went into deep sleep mode and I had to jump it (3/23 to 9/23). It had set for about 4 days. They tried to tell me "Texas heat" blah blah. I have lived here for 45 years and never had a new battery die in 4 days. Anyways, they warrantied the battery, and everything seemed fine....until today. I have been off since last Wednesday night, so once again the vehicle sat for 5 days and low and behold, I just got a deep sleep alert. At least the app warned me this time. Went out and it started and I took it for a 20 minute drive. So like the OP, they thought it was the battery...and changing did help for a while, but then again my vehicle never sits long...but the 2 times it has it has gone into deep sleep (once with the battery entirely dead). Another thing I notice is my truck never auto stop/starts. I know it's hard to tell with hybrids sometimes, but I distinctly remember after the battery was replaced that it would for a few weeks or a month....but I can't remember the last time I noticed it auto stop/start. This ain't a battery issue...something else.

If the the replaced your battery with a non-AGM Ford battery, you will continue to have issues. The solution is installing a non-Ford AGM battery.

Also Ford will be issuing a software fix the the 1st quarter of 2025 that hopefully will solve the battery issues plaguing the Mavericks.

 

[Inverted]

If the the replaced your battery with a non-AGM Ford battery, you will continue to have issues. The solution is installing a non-Ford AGM battery.

Also Ford will be issuing a software fix the the 1st quarter of 2025 that hopefully will solve the battery issues plaguing the Mavericks.

Guess I will wait for that fix. Not crazy about dropping 150$ out of my pocket for an issue Ford can't seem to fix. Hopefully the recall/tsb you refer to becomes a reality.

 

[nunucello]

Having my 12v battery swapped also solved my Deep Sleep issues.

 

[Mav4us]

Dealer replaced mine in July (22 XLT Hybrid) and issue went away. It started back up again about two weeks ago. Located in Seattle (sharing in case climate is relevant - though it shouldn’t be)

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