Deep Sleep FIX - Maverick Hybrid 12V battery - One Year Update

[Deleted member 37952]

Ugh....thought I was in the special minority that hadn't seen the Deep Sleep warning on my '22 with the original battery but I finally got it this morning. Ironically, it was 1 day after finally peaking in to see what battery I had and if maybe the original owner had replaced it for me. Really hope Ford gets something figured out for this soon.

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[NedF]

Ugh....thought I was in the special minority that hadn't seen the Deep Sleep warning on my '22 with the original battery but I finally got it this morning. Ironically, it was 1 day after finally peaking in to see what battery I had and if maybe the original owner had replaced it for me. Really hope Ford gets something figured out for this soon.

I am curious as to when you bought it... maybe the original owner had it replaced under warranty just before they sold it? It would not be unusual for it to be starting to fail if it was the original.

 

[710-oil-614]

This thread lays it out perfectly for anyone with a 22-24 Hybrid - Put an AGM in (H4 or H5). Buy a Forscan dongle and increase your SoC to 90-100%, reduce the 12v accessories timeout down to 60-90 seconds, and keep your vehicle's key fobs away from it.

Or - keep getting deep sleep issues and complaining about Ford.

 

[Deleted member 37952]

I am curious as to when you bought it... maybe the original owner had it replaced under warranty just before they sold it? It would not be unusual for it to be starting to fail if it was the original.

That's a good point and something I have considered since "battery failing due to age" happened to me shortly after buying my last used vehicle.

I bought the car last August and it's been rock steady since then. I WFH so the truck isn't daily driven but it is driven frequently and for relatively long drives.

I'll be looking into whatever might be going on but I am mostly just frustrated with the timing of this finally popping up considering it was right after I decided to take a peek in the battery compartment. Feels like some goofy version of Schrodinger's Battery and I made the mistake of looking in the box and only then finding a problem with my battery.

 

[mav47]

What is the double honk? Mine just did it couple hours ago when I got home. It's so random

@GreyCacti

There are two possibly causes for a double honk that I know of, but considering these newer vehicles honk and beep for almost anything there's likely even more situations

1) Double honk AFTER exiting the truck with the ignition still on / engine still running. So basically when you drop off your kids at school and get out of the truck to give them a hug before they get through the gate that's when the truck double honks.......

This is a safety feature in all modern Fords, likely to prevent for instance people accidentally leaving the engine running inside garages. Our Toyota Highlander does it too, but instead of honking the horn it uses a beeper in the cab, which is far more subtle and doesn't cause anywhere near the same disturbance!

If you have access to Forscan and an OBD2 adapter you can actually turn off this double honk, which is what I was referring to.

2) A sudden double honk WHILE exiting the vehicle. This seems very random, but it isn't:

Turns out, this is because the truck is set to alert you of a "mislock" situation, with the alert being a double honk. The reason why this happens is because the locking button for the doors is located just forward of the door lever. And when you're in a rush, you end up accidentally tapping that lock button while you're reaching for the door lever. This causes the truck to try to lock the doors just while you're opening the driver door, and the truck reports a mislock with the accompanying double honk to alert the driver.

FIX: go into the vehicle settings on the menu between the gauges, to to locks, and turn off "Chirp on mislock". Fixes it completely.

Cheers!

 

[HeyBales]

That's a good point and something I have considered since "battery failing due to age" happened to me shortly after buying my last used vehicle.

I bought the car last August and it's been rock steady since then. I WFH so the truck isn't daily driven but it is driven frequently and for relatively long drives.

I'll be looking into whatever might be going on but I am mostly just frustrated with the timing of this finally popping up considering it was right after I decided to take a peek in the battery compartment. Feels like some goofy version of Schrodinger's Battery and I made the mistake of looking in the box and only then finding a problem with my battery.

Did you get a stack of stuff from prior owner?

If they replaced the battery, and it still has some warranty on it (which I know usually applies to original buyer), you still might be able to bring in receipt and deal with it wherever that battery is handled.
Well, unless they ask for the same CC as shown on receipt - handle as you will!

I'll suggest 3rd party compared to dealer probably won't have as stringent a requirement for "bad" battery as dealer warranty replacement had.

 

[GreyCacti]

@GreyCacti

There are two possibly causes for a double honk that I know of, but considering these newer vehicles honk and beep for almost anything there's likely even more situations

1) Double honk AFTER exiting the truck with the ignition still on / engine still running. So basically when you drop off your kids at school and get out of the truck to give them a hug before they get through the gate that's when the truck double honks.......

This is a safety feature in all modern Fords, likely to prevent for instance people accidentally leaving the engine running inside garages. Our Toyota Highlander does it too, but instead of honking the horn it uses a beeper in the cab, which is far more subtle and doesn't cause anywhere near the same disturbance!

If you have access to Forscan and an OBD2 adapter you can actually turn off this double honk, which is what I was referring to.

2) A sudden double honk WHILE exiting the vehicle. This seems very random, but it isn't:

Turns out, this is because the truck is set to alert you of a "mislock" situation, with the alert being a double honk. The reason why this happens is because the locking button for the doors is located just forward of the door lever. And when you're in a rush, you end up accidentally tapping that lock button while you're reaching for the door lever. This causes the truck to try to lock the doors just while you're opening the driver door, and the truck reports a mislock with the accompanying double honk to alert the driver.

FIX: go into the vehicle settings on the menu between the gauges, to to locks, and turn off "Chirp on mislock". Fixes it completely.

Cheers!

Thank you! I bet it was a mislock. It does seem so random. Key was out of ignition, and it honked when I opened the door.

 

[HeyBales]

Thank you! I bet it was a mislock. It does seem so random. Key was out of ignition, and it honked when I opened the door.

Key was clearly out when door was opened?
With 2 hands that would be very easy to do at almost the same time, but door slightly first.

And even then, there would need to be accidental press of Lock-all button while it's still inserted to get double-honk, and all the locks should be opened on that routine.
Even if you disable the honk, the unlock all shows what happened.
Test it so you see what that process looks like.

The keyless entry/push-button start system provide more opportunities for double-honk, as it tries to figure out fob in cabin or outside - but you don't have that.

Had all your recalls done?

 

[MakinDoForNow]

What is the double honk? Mine just did it couple hours ago when I got home. It's so random

You have gotten out of truck with it still in ready state with key fob. If you wish to leave it running just push lock button on fob to tell truck you want to lock truck and leave it running. You can also lock it with the key pad for same thing.

 

[GreyCacti]

You have gotten out of truck with it still in ready state with key fob. If you wish to leave it running just push lock button on fob to tell truck you want to lock truck and leave it running. You can also lock it with the key pad for same thing.

I thought that I had the key out, but maybe I was opening the door as I was removing the key that is possible!
Thank you for the pointers

 

[GreyCacti]

Key was clearly out when door was opened?
With 2 hands that would be very easy to do at almost the same time, but door slightly first.

And even then, there would need to be accidental press of Lock-all button while it's still inserted to get double-honk, and all the locks should be opened on that routine.
Even if you disable the honk, the unlock all shows what happened.
Test it so you see what that process looks like.

The keyless entry/push-button start system provide more opportunities for double-honk, as it tries to figure out fob in cabin or outside - but you don't have that.

Had all your recalls done?

It is entirely possible the key was not out when I was opening the door probably rushing. And opened while removing the key I thought I had the key out but I must have been mistaken. I have a 24, no recalls done.
XLT, so the key goes in ignition. I will have to mess with it to get it to happen again, has happened a few times randomly but most likely it was operator error. It seems random but maybe the key is not all the way out when I open the door sometimes, I gotta slow down.

 

[Tvin87]

Figured I would throw my experience into this thread as someone that flies to work and parks their vehicle for a week at a time constantly.

When first owning the vehicle in fully stock trim I experienced deep sleep after a couple months and had would remove the battery from the vehicle, recharge to full, reinstall and perform a proper relearn on the BMS. This would only solve my problems temporarily before deep sleep returned.

After reading horror stories of people having no start issues I got concerned and bought a small jump pack that I keep under my back seat now. Thankfully I had it as the next week when I flew home from work my truck was stone dead and the jump pack got me on my way. The next day I went and bought an H5 AGM battery and after a bit of struggle I got it situated in the truck.

Fast forward to today. The AGM battery has been in my truck since the end of August 2024 and I have only had two instances of a deep sleep notification on my phone. Interestingly enough the two times I got those messages I checked the battery voltage at the terminals and it was ~12.1-12.3 volts which is odd because that seems quite high to trigger the BMS.

I work on a rotation of 7 days on and 7 days off so my truck sees a ton of parked time at the airport and I have not had any more instances of no start. Most of the times I get into my truck after its sat for a week it does not illuminate the interior when I unlock it.

Just sharing my experience with an AGM and lots of parked time.

 

[HeyBales]

It is entirely possible the key was not out when I was opening the door probably rushing. And opened while removing the key I thought I had the key out but I must have been mistaken. I have a 24, no recalls done.
XLT, so the key goes in ignition. I will have to mess with it to get it to happen again, has happened a few times randomly but most likely it was operator error. It seems random but maybe the key is not all the way out when I open the door sometimes, I gotta slow down.

Oh forget trying to duplicate as that can be tough.
Just test the known effect of key in (or running) - and hitting the Lock all button. Don't even have to the close door.
Pretty distinctive sound besides the honk.
That way you'll recognize it some other time.

Now - the one that is quiet you don't want to test and for sure want to not rush and cause - pushing the lock lever while pulling handle and opening door.
Have spare key on you if testing that one.
Though might be good to test that one too - just so you know.

 

[Gullzway]

Figured I would throw my experience into this thread as someone that flies to work and parks their vehicle for a week at a time constantly.

When first owning the vehicle in fully stock trim I experienced deep sleep after a couple months and had would remove the battery from the vehicle, recharge to full, reinstall and perform a proper relearn on the BMS. This would only solve my problems temporarily before deep sleep returned.

After reading horror stories of people having no start issues I got concerned and bought a small jump pack that I keep under my back seat now. Thankfully I had it as the next week when I flew home from work my truck was stone dead and the jump pack got me on my way. The next day I went and bought an H5 AGM battery and after a bit of struggle I got it situated in the truck.

Fast forward to today. The AGM battery has been in my truck since the end of August 2024 and I have only had two instances of a deep sleep notification on my phone. Interestingly enough the two times I got those messages I checked the battery voltage at the terminals and it was ~12.1-12.3 volts which is odd because that seems quite high to trigger the BMS.

I work on a rotation of 7 days on and 7 days off so my truck sees a ton of parked time at the airport and I have not had any more instances of no start. Most of the times I get into my truck after its sat for a week it does not illuminate the interior when I unlock it.

Just sharing my experience with an AGM and lots of parked time.

12.2v seems to be when mine would go into deep sleep if I recall. I don't bother checking it anymore.

 

[NedF]

This is the status a few hours after taking the truck for its first decent run since changing the battery from the OEM battery to an AGM. I have not changed anything using FORScan. I am not sure why it is showing 97% if the BMS maxes out at 80%. Maybe it’s because the BMS was just reset and is relearning or more likely the BMS uses a different way to estimate the SoC compared to the app I am using.

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