SSM 53801: 2022-2025 Maverick Hybrid 12V Battery Drain Issue Update Fix Released!

[HeyBales]

I'm surprised by the posts where they went in and tech or perhaps service manager is saying it's VIN based. Good grief.

But I'm not surprised they aren't going to do the suggested service unless you have the problem.

A drained battery.

That simple. Anyone getting the service outside that should probably count themselves fortunate.

And as many have demonstrated in posts thru the year, showing up with an EVENTUALLY drained battery and a no start that morning, unless it happens to also test with a bad cell at that visit - will merely get a recharge, test, and instructions to drive more. Perhaps while it's charging they do the upgrade just while it's there.

If you actually get a parasitic draw (couple posters used that term incorrectly, some small drain is expected, that's not parasitic), that drains the battery overnight or couple of nights, and you jump start into the dealer - then you should get the upgrade. And battery test.
Well, it sounds like within 3 yrs/36k miles. Because really - batteries don't last forever anyway.

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[ZABSMAV]

I'm sorry, zabmav, as you replied to my post to Timothyd, I feel that I must respond.

I was answering a general query as to normal good vehicle use habits as to driving the truck sufficiently, in normal circumstances, to keep everything as good as possible.

I do not believe I referenced it as what anyone should do in the circumstances where they are dealing with this strange battery drain issue.

It is of interest to me to follow the battery drain issue as I have an early 2025 but mine is not presently afflicted with it...as far as I know.

Now, far greater minds than mine are on top of that investigation, both on this site and at Ford. They have all sorts of electronic equipment to aid them in their diagnostics and I hope there will be a solution found as soon as possible.

I can only hope a satisfactory conclusion is found, and I will continue recommending common sense maintenance and use to others who are also not apparently dealing with the lack of sufficient charging for their 12 volt battery.

Thank you for clarifying in my mind as to the lane that I am in and shall stay in, and not provide advice to those in your position and awaiting assistance with you battery charge dilemma.

Cheers,

Andy

THIS ^^^^^^^^

My 23 hybrid has had deep sleep since the beginning, I have held off on all updates and recalls, but I am still on my original flooded battery. I have about 10k miles, and I have an in-car NOCO 2A charger/maintainer connected that I use to top off periodically. I have the Noco connected past the negative terminal sensor so the BMS should be seeing and registering the charge. I don't bother resetting BMS every time since it should be detecting the change in voltage from the charge. Well after a weekend of charging, it then drove fine Monday, but Tuesday morning was my first totally dead Mav ever.

So I jumped it and then trickle charged for 8-12 hours, then I did the "full" BMS reset in the manual which includes waiting 8 hours (the manual isn't clear that both need to be done for the system to detect true voltage levels). In the morning with the Mav in drive mode my cigarette lighter USB charger voltage readout showed 12.6 volts (not charging) for the first time vs the 14.6 volts (charging) that I generally see when the car is on and in drive mode, I think that was a good sign as the car wasn't trying to charge the battery since it was charged. Now my readings at the battery with a DMM match what the USB charger says. I know my original battery is likely cooked at this point, but over the coming long weekend I am going to let the NOCO charger fully charge AND recondition the battery to solid green and do the "full" BMS reset again and wait 8 hours and see how long I can go with my old battery and my short trip driving before I get deep sleep again.

Could it be that the BMS gets out of sync, either by normally driving/charging, or externally charging over time? I think Ford is focused on small parasitic draws that could be a minor layer to the problem, but I think the main problem is the Mav isn't charging the 12v battery enough possibly due to BMS protection or BMS not knowing the true charge of the battery. 2Gen Prius had a similar 12v set up but without this "smart" BMS and their AGM battery would last 8 years even with parasitic draws like the key fob receiver. I hope someone who drives short trips can report back after getting this new service bulletin performed and have positive results.

It is ridiculous that you have had to do what you would think Ford would be doing. You probably have 10 times the knowledge of Ford engineers. It appears to be insulting to real engineers to call the ones at Ford engineers.

 

[ZABSMAV]

My exact fear the dealers will just say NO You have no problem.

I myself just keep charging the battery up mostly in the winter time. So on original battery from August 2023. I have no record of replaced dead batteries like some of you . I just didn't let it happen.

So it sounds like it wont ever get fixed. I guess eventually by an AGM battery and use forscan which I don't have yet to change SOC and that is best it will ever be. Pretty sucky if you ask me.

Ford switched to AGM-type batteries in 2025 Maverick hybrids and the owners of those are now reporting the deep sleep problem.

 

[clofan]

Dealership did the SSM 53801 procedure on my truck, but upon picking it up from the shop I got the warning again on my app. Opened a ticket with Ford, they weren't willing to do anything unless it happens again. 800 miles / 40 days until the warranty is gone. Was going to take the truck on a road trip next week but that ain't happening now.

 

[HeyBales]

I have had the battery replaced three times on my 2024 Ford Maverick Hybrid. It has been very frustrating to say the least. They keep telling me I have to drive it everyday or let it idle for 15-20 minutes ever day or use a trickle charger. To me, this is ridiculous that a brand new vehicle is doing this. Yes, I had the ACCM software update done yesterday. When I picked up the truck, I got the battery preservation warning. Hopefully, this fixes the problem. Fingers crossed.

Hopefully they had a maintainer on it during the upgrade - but no extra time.
Probably not charged up unless they said they did.
Sure hope they didn't drain the battery doing the upgrade without a maintainer.

That would be worth a call, that you got the notice after they were done, asking them if they did it without a maintainer.

Now that would be stupid, but not unheard of if the tech person doesn't think about it.

I always picture that tire tech video - squirting soaping water on tire when it's off rim.

When did you get the 24, to have 3 new batteries at this point?

 

[johnDeere]

Finally found the battery draw info, expected and timeout - in service manual.

NOTE: No factory-equipped vehicle should have more than a 25 mA (0.025 amp) – 50 mA (0.050) draw depending on the vehicle's accessories. Check for current drains on the battery in excess of 25 mA (0.025 amp) – 50 mA (0.050) with all the electrical accessories off and the vehicle at rest for at least 75 minutes (depending on region). Current drains can be tested with the following procedure.
NOTE: Many electronic modules draw 10 mA (0.010 amp) or more continuously.
NOTE: Typically, a drain of approximately 1 amp is attributed to an engine compartment lamp, glove compartment lamp or interior lamp staying on continually. Other component failures or wiring shorts are located by selectively pulling fuses to pinpoint the location of the current drain. When the current drain is found, the meter reading falls to an acceptable level.
NOTE: To accurately test the drain on a battery, use an in-line ammeter between the negative battery post and its respective cable. Use of a test lamp or voltmeter is not an accurate method.

Thank you for the post.
Interesting they do NOT say anywhere in the write up about when the truck "phones home" and how many watts are used for that. I know I hear my 23 mav. hybrid XLT relays click now and then.

I was trouble free from deep sleep notification for 4 months.
Monitored the voltage and amps with a remote unit connected to the battery. (so I could see it when the truck was off).
Last week received the message on my phone ( load dumping, no ford pass remote starting) at 10:30 AM, I get to work at 7 am, so 3.5 hr to drain down low enough to send out alert.
Though it was ODD. the only thing that was different was the shutter was open and fan was running when I got out of the truck to pull the truck into the garage. normally the fan is off and the shutter is closed.
NO reason the shutter should be open and the fan running.
Normally I can go all day and still have 12.4v in the battery.

 

[HeyBales]

Thank you for the post.
Interesting they do NOT say anywhere in the write up about when the truck "phones home" and how many watts are used for that. I know I hear my 23 mav. hybrid XLT relays click now and then.

I was trouble free from deep sleep notification for 4 months.
Monitored the voltage and amps with a remote unit connected to the battery. (so I could see it when the truck was off).
Last week received the message on my phone ( load dumping, no ford pass remote starting) at 10:30 AM, I get to work at 7 am, so 3.5 hr to drain down low enough to send out alert.
Though it was ODD. the only thing that was different was the shutter was open and fan was running when I got out of the truck to pull the truck into the garage. normally the fan is off and the shutter is closed.
NO reason the shutter should be open and the fan running.
Normally I can go all day and still have 12.4v in the battery.

I'll try to find the thread where member did some great testing and had logs - before & after fuse pull, during those relay clicks, testing fob on non-keyless entry system, ect.

After you park is a status update with data, and thereafter an hourly "ping" just to keep the ATT network data connection "up", so truck could be reached remotely by their system and Fordpass app ultimately.
He had Volts only, so a less than 1 min rise and drop hourly. Not likely many amps, as cell radios just aren't that high.


If your issue was not related to the ACCM doing some mistaken request, your example is exactly my fear with this SSM.
Would an upgrade to ACCM be done if you had an actual drain causing a dead battery?
And then how much time would be spent until they finally did the long haul troubleshooting of finding where the real issue was?

Then again - running a fan seems like exactly a call by the ACCM. Not right then, of course a mistaken call, but would explain it and hopefully be fixed by upgrade.

In the last year watching these threads - the number of actual battery drains being posted about is very small (that I've seen), vastly overshadowed by the just poor charging strategy killing batteries eventually, after causing maximum annoyance and frustration.

 

[S Dundee]

Our local Ford dealer seems unwilling to apply SSM 53801 for my 2023 Hybrid Maverick because it is not a campaign or a recall. I guess they are worried about not getting reimbursed by Ford. Anyone else running into Ford dealer push back?

 

[samspritzer]

I'm surprised by the posts where they went in and tech or perhaps service manager is saying it's VIN based. Good grief.

But I'm not surprised they aren't going to do the suggested service unless you have the problem.
(snip)

I am really fortunate to have a dealer who cares about the customer and a technician who really knows Mavericks especially since he owns one. I took mine in yesterday for service and had SSM 53801 done. So far, no deep sleep message. Lets hope it stays that way.

According to the tech, there was something about DTCS U0164:00 not clearing from PCM after doing the SSM update. He did an update to PCM to clear that and it triggered an update to SOBDMC. That cleared U0164:00. More info about the code can be found here https://www.obd-codes.com/u0164.

 

[RevHart]

Hopefully they had a maintainer on it during the upgrade - but no extra time.
Probably not charged up unless they said they did.
Sure hope they didn't drain the battery doing the upgrade without a maintainer.

That would be worth a call, that you got the notice after they were done, asking them if they did it without a maintainer.

Now that would be stupid, but not unheard of if the tech person doesn't think about it.

I always picture that tire tech video - squirting soaping water on tire when it's off rim.

When did you get the 24, to have 3 new batteries at this point?

I bought the truck December 2023. I didn't have the problem at first, but then it kicked in. I don't know if they put a maintainer on or not. I will have to look at the invoice. The service person at the dealership said to me, "I hope we don't see you again". If the battery goes dead, then they will see me again. Hopefully, the update solved the problem.

 

[johnDeere]

That’s great you have a dealer and a tech that are understanding and willing to make it right, and I guess it helps if the tech has a maverick too.
thank you for the link.

 

[Master Blaster]

Our local Ford dealer seems unwilling to apply SSM 53801 for my 2023 Hybrid Maverick because it is not a campaign or a recall. I guess they are worried about not getting reimbursed by Ford. Anyone else running into Ford dealer push back?

It says right in the SSM how to log the hours against what component so that Ford will reimburse them. Your dealer is a moron.

 

[Deb from MN]

Our local Ford dealer seems unwilling to apply SSM 53801 for my 2023 Hybrid Maverick because it is not a campaign or a recall. I guess they are worried about not getting reimbursed by Ford. Anyone else running into Ford dealer push back?

Yes

 

[inline_five]

I'll try to find the thread where member did some great testing and had logs - before & after fuse pull, during those relay clicks, testing fob on non-keyless entry system,

@johnDeere

Battery log data

I neglected to finish my tests however found telematics was not what was draining it into deep sleep territory in my case. But I live in an area of good cell coverage. No idea if that would draw more or not.

I have noticed ACCM errors when I pull DTCs if the HVAC module is off (ie fan is not on when I pull the codes). However it goes away if I turn the HVAC on.

 

[HeyBales]

I bought the truck December 2023. I didn't have the problem at first, but then it kicked in. I don't know if they put a maintainer on or not. I will have to look at the invoice. The service person at the dealership said to me, "I hope we don't see you again". If the battery goes dead, then they will see me again. Hopefully, the update solved the problem.

Now that sounds like a drain killing the batteries.
Which is what this upgrade should fix.
Well, if the ACCM was the cause.

If it did - then you can join rest of us with undercharged battery issues eventually!

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