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

[Darnon]

To our knowledge, there’s no way to keep the circuit live.

Seems like it'd be a simple enough thing to create a jumper wire between the, IIRC, two terminals on the top left of the lower junction box that supply power to the fuse box assembly proper.

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[HeyBales]

2nd battery replaced 05/27/2025 on my 2023 with ACCM Software update i am hopeful new hardware (battery) and software update will contribute to fix!

My Service tech notes on invoice:
===
Customer concern verified. Vehicle goes into Deep Sleep Mode when not driven for 2 days.
Found SSM53801 that is applicable
Performed Battery Diagnostic test: BATTERY FAILED , ACES code: H898P, DTC Code 1BJXJA100LP5
Removed / Replaced battery, Reset BMS, Performed ACCM SOFTWARE UPDATE, Cleared DTC's.
Vehicle no longer in deep sleep or BATTERY SAVER MODE
Customer Concern Resolved (i am so hopeful!!!)
===
-I pulled fuse (trucklette still slept like a baby)
-driving every day or not for 2 day (trucklette still slept like a baby)
-warm or cold weather (trucklette still slept like a baby)

Just to finish it - you let it sleep overnight locked?

I think they may be assuming the BMS relearn happens - but how many take truck home, park in garage, unlocked.

 

[Master Blaster]

2nd battery replaced 05/27/2025 on my 2023 with ACCM Software update i am hopeful new hardware (battery) and software update will contribute to fix!

My Service tech notes on invoice:
===
Customer concern verified. Vehicle goes into Deep Sleep Mode when not driven for 2 days.
Found SSM53801 that is applicable
Performed Battery Diagnostic test: BATTERY FAILED , ACES code: H898P, DTC Code 1BJXJA100LP5
Removed / Replaced battery, Reset BMS, Performed ACCM SOFTWARE UPDATE, Cleared DTC's.
Vehicle no longer in deep sleep or BATTERY SAVER MODE
Customer Concern Resolved (i am so hopeful!!!)
===
-I pulled fuse (trucklette still slept like a baby)
-driving every day or not for 2 day (trucklette still slept like a baby)
-warm or cold weather (trucklette still slept like a baby)

Ok I'll bite - What's a trucklette?

 

[23OxOrdered]

Just to finish it - you let it sleep overnight locked?

I think they may be assuming the BMS relearn happens - but how many take truck home, park in garage, unlocked.

during my 14 months of dealing with deep sleep mode my mavvy trucklette has been parked outside locked for couple days and in my garage not locked for couple days, I got deep sleep either way -- i missed note in this thread if you leave it locked or unlocked there might be different sleep mode outcomes.

 

[23OxOrdered]

Ok I'll bite - What's a trucklette?

"mavvy trucklette" (oxford white > vanilla trucklette) is my pet name for my F50 ride -- ok here come the jokes

 

[HeyBales]

during my 14 months of dealing with deep sleep mode my mavvy trucklette has been parked outside locked for couple days and in my garage not locked for couple days, I got deep sleep either way -- i missed note in this thread if you leave it locked or unlocked there might be different sleep mode outcomes.

That comment has nothing to do with low battery level that kicks off battery saver and then deep sleep mode.
Locked/unlocked has nothing to do with low battery levels.

It has everything to do with what the manual says needs to be done after you install a new battery. Or charge one up.
They did the BS reset - but the BMS relearn needs exactly what I said.

 

[23OxOrdered]

That comment has nothing to do with low battery level that kicks off battery saver and then deep sleep mode.
Locked/unlocked has nothing to do with low battery levels.

It has everything to do with what the manual says needs to be done after you install a new battery. Or charge one up.
They did the BS reset - but the BMS relearn needs exactly what I said.

Oh my bad i asked a ford tech months ago if doing BMS reset would be a good thing to kick out of deep sleep, he gave recommendation don't use a troubleshooting step rather as a step for battery replacement --- on that note i am running 3 days with no deep sleep but it is a new battery. I am so hopeful software update with hardware (battery) is fix!

 

[icegradner]

Oh my bad i asked a ford tech months ago if doing BMS reset would be a good thing to kick out of deep sleep, he gave recommendation don't use a troubleshooting step rather as a step for battery replacement --- on that note i am running 3 days with no deep sleep but it is a new battery. I am so hopeful software update with hardware (battery) is fix!

For me all it takes is one week after recharging the battery to get back there, but I assume a new battery will do better. I know I won't be able to get the SSM done, since the dealership always says my 12v battery is "fine"*, even though it's in deep sleep all the time.

* Fine as in, they charge it and it tests as good.

 

[HeyBales]

Oh my bad i asked a ford tech months ago if doing BMS reset would be a good thing to kick out of deep sleep, he gave recommendation don't use a troubleshooting step rather as a step for battery replacement --- on that note i am running 3 days with no deep sleep but it is a new battery. I am so hopeful software update with hardware (battery) is fix!

Your tech was correct, BMS reset is not solution to deep sleep.
But I was never talking about troubleshooting - I replied to your post that you got a new battery.

You are still missing the point, and different terms used.
And BMS reset is not what I said though. Twice.
I'm trying to help you have a new battery that will be charged as best as it'll get.
Because as I said - many people park truck in garage unlocked.

I'd suggest read the whole manual section on battery replacement.
Here is the part you are not getting.

After battery replacement, or in some cases after charging the battery with an external charger, the battery management system requires eight hours of vehicle sleep time to relearn the battery state of charge. During this time, your vehicle must remain fully locked with the ignition switched off.
Note: Prior to relearning the battery state of charge, the battery management system may temporarily disable some electrical systems.

 

[MakinDoForNow]

They sent me out with a new Bronco! That was a surprise for me, but the service manager said they always use new vehicles as loaners! Wow!

I assume that happens at MSRP dealer when lightly used models sell for MORE than MSRP.

 

[MakinDoForNow]

during my 14 months of dealing with deep sleep mode my mavvy trucklette has been parked outside locked for couple days and in my garage not locked for couple days, I got deep sleep either way -- i missed note in this thread if you leave it locked or unlocked there might be different sleep mode outcomes.

The locking and sitting needs to be done immediately after the battery is fully charged. I use a noco g5 maintainer that is multistage, sulfation and optimization functions. When I have time I will put my noco on jump posts and lock the hybrid and leave it (if possible until it finishes). My 22 Lariat with 39k miles had it's battery replaced for bad cell at 33-34 months with about 29k miles. Never deep slept but when some light didn't come on I put noco on locked truck. My second 22 XLT LUX hybrid has 4,300 miles and sees the noco every 2-3 months when dome light doesn't come on with being locked. It has about 31 months since delivery. Never deep slept either. It has the OEM 390 CCA BATTERY. I have left the noco on this truck for nearly two weeks and once a day will unlock truck for a minute or two which uses a little juice. Then I relock the truck which restarts the noco that and then the truck apparently reruns the battery learn procedure. This insures that the battery learn sees the battery at 100% Multiple Times in a Row. Might or might not help, who knows. I leave hood up and check voltage at jump pins. If I take noco off, close hood I can drive truck 20-30 miles, maybe more every 1-3 days 24 hours +/- I can check voltage and it will be 12.4-12.6. Very few are going to do this but seems to be a wise thing to do 2-3 times a year probably with any battery.

 

[samspritzer]

I just want to jump in....without sounding critical or condescending. I had the deep sleep issue for the better part of 3 years. It was more of an annoyance and it didn't affect the operation of the truck. I just recently had the SSM applied and out of habit, I keep checking FordPass. No messages. While its too soon to declare victory I do need to give a ton of credit to the technician who tirelessly worked this issue from day 1.

 

[Vettereddie]

Ok I'll bite - What's a trucklette?

Baby truck doo doo doo doo

I've gotten the deep sleep notice sporadically a few times but can't find alerts older than 30 days on the Ford app, assuming I'd need to wait for an active issue to pop up before taking it to the dealer to get an update unless it becomes a Service Campaign. Fingers crossed if the battery goes it's inside the warranty period to get a no-cost replacement, otherwise will go out of pocket for an AGM first.

 

[Master Blaster]

Its an SSM instead of a recall, because it won't cause a hazard on the road. The truck will just start doing deep-sleep consequences like lights not working and doors not unlocking, and that won't kill people.

 

[Darryl]

Seems like it'd be a simple enough thing to create a jumper wire between the, IIRC, two terminals on the top left of the lower junction box that supply power to the fuse box assembly proper.

If I ABSOLUTELY HAD to, I could probably figure something out. But thankfully this far I've been able to figure out the problem without having to go that route

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