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

[Red Eyes - Wide Shut]

I hope that is all. But I bought a 2025 Hybrid Maverick March 28th. In may and June dead batteries, noticed some lights on the dash coming on well after the vehicle w, reloaded the A/ram and still problems. Ford up buying it back I did not h go through my state's lemon law. Just after Ford agreed to buy it, the services department at the dealership was suggesting replacing a modulator panel. I liked the truck, so I got a replacement for the same purchase price.

Same old problem still! I thought it was fixed for 2025. Nice!

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[HeyBales]

I had this done ("air conditioning control module (ACCM) software update), didn't work. Deep Sleep Mode next morning.

Unless you were getting a dead battery after a day or two - you didn't have the issue that SSM was fixing in the ACCM - intermittent battery drain.

Unless they happened to fully charge your battery while they did it, you probably just ended up with the fact of normal low voltage battery and the battery saver "features" kicked in to keep it alive enough to start.

Does their work order say they fully recharged the battery and tested it from overnight?
That's supposed to be done - hidden in the line about "perform a battery condition test".

If they did recharge it correctly - did you leave it locked overnight for the next step they can't do there - BMS Relearn?
I don't understand why they don't tell drivers that - many drivers don't lock their cars in their garage.

Now - there have been posts of the TCU getting stuck on an old SOC% value, and as such disabling the modem, aka "deep sleep mode", right after a stop and last data upload report.
So if shop and you did the steps above - that could be a thing.
DSM doesn't need to be engaged, but it is due to bad retained figure.
Or you have another misbehaving module - that TCU has been reported in at least 3 threads I've seen (and I've never seen ACCM reported prior to the SSM).

 

[ZABSMAV]

Unless you were getting a dead battery after a day or two - you didn't have the issue that SSM was fixing in the ACCM - intermittent battery drain.

Unless they happened to fully charge your battery while they did it, you probably just ended up with the fact of normal low voltage battery and the battery saver "features" kicked in to keep it alive enough to start.

Does their work order say they fully recharged the battery and tested it from overnight?
That's supposed to be done - hidden in the line about "perform a battery condition test".

If they did recharge it correctly - did you leave it locked overnight for the next step they can't do there - BMS Relearn?
I don't understand why they don't tell drivers that - many drivers don't lock their cars in their garage.

Now - there have been posts of the TCU getting stuck on an old SOC% value, and as such disabling the modem, aka "deep sleep mode", right after a stop and last data upload report.
So if shop and you did the steps above - that could be a thing.
DSM doesn't need to be engaged, but it is due to bad retained figure.
Or you have another misbehaving module - that TCU has been reported in at least 3 threads I've seen (and I've never seen ACCM reported prior to the SSM).

Why would we, as owners, lock the doors of our Maverick hybrid if the vehicle is locked inside our garage?

 

[HeyBales]

Why would we, as owners, lock the doors of our Maverick hybrid if the vehicle is locked inside our garage?

Exactly.

But it's required for the BMS Relearn procedure for a new battery or recharged battery.
Otherwise your BMS system is not going to have as bad of an accurate SOC% as it could have.
I mean as good as.
No - as bad as.

But that's my point - I've not see a work order yet that said to customer to do that required step, or tell customer, ect, for those times they didn't keep it overnight after a charge up and no testing the next day.

If people aren't doing that step from the manual - they could easily be causing some of their own battery issues.

 

[ZABSMAV]

Exactly.

But it's required for the BMS Relearn procedure for a new battery or recharged battery.
Otherwise your BMS system is not going to have as bad of an accurate SOC% as it could have.
I mean as good as.
No - as bad as.

But that's my point - I've not see a work order yet that said to customer to do that required step, or tell customer, ect, for those times they didn't keep it overnight after a charge up and no testing the next day.

If people aren't doing that step from the manual - they could easily be causing some of their own battery issues.

We had the AC "fix" applied and are on our third battery. Was never mentioned, or put into any written documentation to do what you are saying about locking for that time. How do you do that and get the vehicle home from the dealership? We were the first one at that dealership to bring it in for Ford's supposed "fix" to prevent it from goings into the deep sleep problem. We are one of MANY at the dealership ALL complaining about the deep sleep problem in their hybrid Mavericks. The dealership says that Ford is not communicating very well with them that there is a problem, yet the dealership knows that there is.

 

[HeyBales]

We had the AC "fix" applied and are on our third battery. Was never mentioned, or put into any written documentation to do what you are saying about locking for that time. How do you do that and get the vehicle home from the dealership? We were the first one at that dealership to bring it in for Ford's supposed "fix" to prevent it from goings into the deep sleep problem. We are one of MANY at the dealership ALL complaining about the deep sleep problem in their hybrid Mavericks. The dealership says that Ford is not communicating very well with them that there is a problem, yet the dealership knows that there is.

That's what I mean - they are leaving what is probably an important step out of an instruction to customers to do.

Doesn't say it can't be driven, just need to do it the next time it's going to be parked for awhile.

That SSM was NEVER claimed to be a way to get out of deep sleep mode - that was rumor and hope from people on here. It was a (hopeful) fix for an intermittent battery drain issue.
Very few posters were having battery drain issues with dead battery some mornnig - because they could keep starting their truck despite DSM.

The SOC% determines how much charge to give the battery while driving. It decides when to kick on battery save and deep sleep actions. And the Relearn gives a reset to that figure.

I'm not saying it's going to magically make the system charge enough to stop DSM eventually happening - but if the system has the wrong figure for what state your battery is in - it sure isn't helping the situation.

With the way coding things happens with everything now - what Ford receives is probably only a warranty notice for a bad battery (since that is only time they replace), to reimburse the dealership for labor/material.
I wouldn't be surprised if there is no warranty reimburse for testing the battery when it's not bad yet - why so many posts mention getting a simple test done first, and told to drive more because it's not bad enough. May get a more serious test early on depending on your dealer. But if it's not below 39% (or 40%?) still no replacement.

It would be nice to know if Ford has coding on warranty reimburse for low battery charge for them to even hear about it.
For all we know - they think they just have some bad cheap batteries in the pre-25MY's, and hope the math makes the savings worthwhile vs the replacements.

From manual under replacing battery, both EB & hybrid:

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.

 

[Timothyd]

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 wonder how many people actually have this issue? I just let my Mav sit for 4 weeks and it came back up like new.

 

[Red Eyes - Wide Shut]

Wha

I wonder how many people actually have this issue? I just let my Mav sit for 4 weeks and it came back up like new.

What do you mean, it came back up like new? Many people including me have had dead batteries over and over.

 

[HeyBales]

I wonder how many people actually have this issue? I just let my Mav sit for 4 weeks and it came back up like new.

I only saw 3 or 4 threads about an actual parasitic drain leaving the battery drained after a day or two. Prior to the SSM.
2 were the TCU module flaking out, 1 wasn't mentioned.

After that SSM came out - I recall 1 thread where poster discovered his AC fan was running for 45 min after turnoff, if he left AC enabled on turnoff. There may have been others in that thread testing and noticing same thing.
Considering AC is sometimes in auto-mode despite button being off - I wonder how many would notice fan running for long after turnoff on hot days?
Many of us are used to car fans running for cooldown after turnoff.

Vast majority of threads about deep sleep mode or battery problems, the truck still runs - they've just been informed or noticed the voltage was low, and eventually a dealer check under warranty leads to a new battery. Sometimes many of them. Compared to others with no issue.

 

[Timothyd]

I only saw 3 or 4 threads about an actual parasitic drain leaving the battery drained after a day or two. Prior to the SSM.
2 were the TCU module flaking out, 1 wasn't mentioned.

After that SSM came out - I recall 1 thread where poster discovered his AC fan was running for 45 min after turnoff, if he left AC enabled on turnoff. There may have been others in that thread testing and noticing same thing.
Considering AC is sometimes in auto-mode despite button being off - I wonder how many would notice fan running for long after turnoff on hot days?
Many of us are used to car fans running for cooldown after turnoff.

Vast majority of threads about deep sleep mode or battery problems, the truck still runs - they've just been informed or noticed the voltage was low, and eventually a dealer check under warranty leads to a new battery. Sometimes many of them. Compared to others with no issue.

After all the alarm I got one of those meters that plug into the cigarette lighter. It's been showing normal with the voltages good but having it there for me to monitor things makes me feel better.

 

[HeyBales]

After all the alarm I got one of those meters that plug into the cigarette lighter. It's been showing normal with the voltages good but having it there for me to monitor things makes me feel better.

You might confirm with multimeter how much it's off - mine reads 0.2 high.
But yes - it does help to see each morning that while it may be hanging around 12.0 +- .2 V, it does stay there.
And when it starts dropping each day - you know what's next.

 

[MakinDoForNow]

After all the alarm I got one of those meters that plug into the cigarette lighter. It's been showing normal with the voltages good but having it there for me to monitor things makes me feel better.

I use one in my cig lighter style power port also. I did not purchase one with an air gap on/off switch so I have to pull it partway out when I turn truck off to prevent it from keeping the led's from keeping the power port active and drawing power.

 

[HeyBales]

I use one in my cig lighter style power port also. I did not purchase one with an air gap on/off switch so I have to pull it partway out when I turn truck off to prevent it from keeping the led's from keeping the power port active and drawing power.

Well see now, there's the benefit to having a half-dead battery all the time.
Those ports go off almost immediately!

But you with a well maintained battery could get the 75 min max out of them.
And courtesy lights when you need them!

 

[Red Eyes - Wide Shut]

Don't forget about SSM #53087 and at least 2 others regarding 12v battery drain from the vehicle I don't believe they have a real answer for the problem. Just lots of questions.

 

[DJT]

Mine is in the shop as I type for the update. YAY....

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