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

[jwesterly]

instead of ford hoping to find the draw purely thru software means (can bus) they should put an engineer on a data logging computer board with multiple current sensing heads that they can strap on various power lines and let it run and analyze afterward - a very similar thing already exists for home service panel branch circuit monitoring.

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[ZABSMAV]

instead of ford hoping to find the draw purely thru software means (can bus) they should put an engineer on a data logging computer board with multiple current sensing heads that they can strap on various power lines and let it run and analyze afterward - a very similar thing already exists for home service panel branch circuit monitoring.

Are you assuming that Ford actually cares about quality and has competent engineers? The deep sleep problem has occured since the 2022 model year. You think the bean counters at Ford might be willing to fund something like you suggest? That type of engineering would make far too much sense. They are too busy redesigning the next egly front end for upcoming Maverick model years.

 

[SafetyGuy]

Thanks. As I have a hybrid i make an effort to get in a decent drive every so often to get the engine to max temperature for awhile to lose moisture. About once a week. Probably good for the battery too.

Absolutely, a good plan.

That heats the engine, oil, everything and gets rid of all the extra moisture, sludge and what have you that builds up with never warming the engine up fully or long enough...and for a long enough period to make sure you are rid of the moisture.

Short cold engine runs will not only kill your 12 volt battery, it will kill your engine before it's time.

We live about 8 miles out of the city. Run to appointments etc, pop about getting great city mileage above the EPA estimate, pop home again at 62 mph each way on the highway.

Good for another week.

Andy

 

[ZABSMAV]

Absolutely, a good plan.

That heats the engine, oil, everything and gets rid of all the extra moisture, sludge and what have you that builds up with never warming the engine up fully or long enough...and for a long enough period to make sure you are rid of the moisture.

Short cold engine runs will not only kill your 12 volt battery, it will kill your engine before it's time.

We live about 8 miles out of the city. Run to appointments etc, pop about getting great city mileage above the EPA estimate, pop home again at 62 mph each way on the highway.

Good for another week.

Andy

We live in metropolitan area, but most of our trips are less than 20 miles round trip. That was the specific reason we considered and chose a hybrid. The fact that they heavily promoted it as having such high local miles per gallon was what convinced us it was the right choice. Never mentioned was the fact that the design of the battery charging circuit is simply inadequately designed to recharge the battery. It doesn't matter if it is a short local trip or a 300 mile round trip on the highway. We've came back from such a longer trip and that very evening the vehicle went into deep sleep problem again. Ford's rediculous suggestion to simply drive more is a disingenuous cop out on this engineering foul up. Another person on here posted results of tests they ran showing the charging circuit starts out a a slightly higher rate of charge (amps) but quickly tapers off to a trickle charge. It's not the type of battery or the battery type settings. Some have said the solution is an AGM battery, but they are also having the same problem, as Ford has added the 2025 hybrid models to the list of those affected by the deep sleep problem. We have two other vehicles with traditional alternators and batteries and never have any problems with them in short trips. Ford needs to get this problem solved , but most owners are starting to believe that Ford is incapable of that task. Time will tell. Meanwhile, we have a right to complain, and will.

 

[SafetyGuy]

We live in metropolitan area, but most of our trips are less than 20 miles round trip. That was the specific reason we considered and chose a hybrid. The fact that they heavily promoted it as having such high local miles per gallon was what convinced us it was the right choice. Never mentioned was the fact that the design of the battery charging circuit is simply inadequately designed to recharge the battery. It doesn't matter if it is a short local trip or a 300 mile round trip on the highway. We've came back from such a longer trip and that very evening the vehicle went into deep sleep problem again. Ford's rediculous suggestion to simply drive more is a disingenuous cop out on this engineering foul up. Another person on here posted results of tests they ran showing the charging circuit starts out a a slightly higher rate of charge (amps) but quickly tapers off to a trickle charge. It's not the type of battery or the battery type settings. Some have said the solution is an AGM battery, but they are also having the same problem, as Ford has added the 2025 hybrid models to the list of those affected by the deep sleep problem. We have two other vehicles with traditional alternators and batteries and never have any problems with them in short trips. Ford needs to get this problem solved , but most owners are starting to believe that Ford is incapable of that task. Time will tell. Meanwhile, we have a right to complain, and will.

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

 

[Aherpa]

SSM 53801 2022-2025 Maverick - Hybrid - 12V Battery Drain - Built On Or Before 17-Feb-2025

Some 2022-2025 Maverick vehicles with a hybrid powertrain and built on or before 17-Feb-2025 may exhibit a 12V battery drain. This may be due to the software installed in the air conditioning control module (ACCM). To correct this condition, perform a battery condition test as outlined in Workshop Manual (WSM), Section 414-01 Battery, Mounting and Cables > Diagnosis and Testing > Pinpoint Test A. Service the battery as necessary. Connect a battery charger such as Rotunda GRX-3590 or DCA-8000 to the 12-volt battery. Download and run the "air conditioning control module (ACCM) software update" application in the Ford Diagnosis And Repair System (FDRS) scan tool. If the battery was replaced, download and run the "BCM-reset the battery monitoring sensor learned values" application in FDRS. For claiming, use causal part 19703 and applicable labor operations in Section 10 of the Service Labor Time Standards (SLTS) Manual.

They have coded the causal part number to the a/c compressor, so it will be covered 3/36, and I already checked and it is covered under Ford Premium ESP also...(not sure about the other level contracts)

I had not experienced the issue but had disabled telematics from day one, so I was somewhat surprised the issue was buried in the AC.
Glad they found it but I'm hesitant to apply a 'fix' for I problem I haven't experienced. I think I'll wait and see if others have issues with the fix.

 

[05Ret]

Anyone been to Ford Service to ask about getting this service performed? I went to have my oil changed on my 2023 Lariat Hybrid and showed the service tech this notice. Her comment was "it says SOME." Another tech said the condition is VIN dependent and my truck wasn't on the list. I tried to explain that my truck suffered from the deep sleep syndrome but they said there is nothing they can do right now. Just wondering what others are hearing.

 

[Deb from MN]

I just talked to service, he told me that my Mav has no recall, although my truck (after 2 new batteries) still has this problem. My warranty is up the end of this month, although I did buy premium extended warranty, so I am not paying for a diagnostic for them to tell me there is nothing wrong....any suggestions?

 

[RevHart]

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.

 

[johnDeere]

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.

Did they replace the battery with a AGM in the past?
I am assuming when they did the service, they charged the battery? If so I wounder why you received the message?
I agree, for a new truck, you should not have to run it for 15-20 minutes just to charge the battery, but they have had this problem for the past 4 years. (22-25).

I have read that some owners have pulled the fuse (11-12) for the "telematics" and had good results. No battery drain that would cause the interior lights NOT to light.

When pulling the fuse, you will not get the sleep mode message.
Since you had the ACCM software updated, I wonder if it addressed the configuration of the BMS.
733-01-04 xxBx-xxx-xx--. The area where the B is, it's a listing for battery management system. mine is set to B but B is not shown on my 23 Maverick Livnitup spreadsheet.
I found the full code from my "as built" and what forscsan showed.

 

[MavTime]

So are we to assume that vehicles built after February 2025 don't have these 12V battery drain issues? I know I've seen a few owners here with 2025's that have reported having the deep sleep issues. Curious as to what your build date is on your 2025 if you have experienced the deep sleep issue.

Somebody reported a dead battery in a 2025. I know all this is anecdotal and doesn't help us much, but I don't think it is as simple as the HVAC or needing an AGM battery or a parasitic draw.

 

[HeyBales]

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.

 

[MavTime]

As @Glen Baker LLC might respond. I think the BMS is somehow at the bottom of all these woes.

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 voltage 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 always-on voltage 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.

 

[TheSEARCH]

Anyone been to Ford Service to ask about getting this service performed? I went to have my oil changed on my 2023 Lariat Hybrid and showed the service tech this notice. Her comment was "it says SOME." Another tech said the condition is VIN dependent and my truck wasn't on the list. I tried to explain that my truck suffered from the deep sleep syndrome but they said there is nothing they can do right now. Just wondering what others are hearing.

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.

 

[HeyBales]

Are you assuming that Ford actually cares about quality and has competent engineers? The deep sleep problem has occured since the 2022 model year. You think the bean counters at Ford might be willing to fund something like you suggest? That type of engineering would make far too much sense. They are too busy redesigning the next egly front end for upcoming Maverick model years.

To add to this Ford mentality - the SSM this thread is about was basically a way to stop techs from spending time to track down a parasitic drain.

Reset the whole truck computer system and every module.
Recharge the battery.
Test it wasn't ruined by the drain. Replace when it finally is.
Tell the customer a solution is coming.

Now - we have had at least 3 threads on drains that were found that were NOT the ACCM, seems 2 were the TCU, can't recall the 3rd one.
And of course as things age, other potential drains will show up most likely.
After this upgrade is in place - will the tech go back to tracking it down?

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