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

[JPinMD]

@JPinMD

That cable under the hood issue is a loose eyelet, essentially disconnecting the 12V battery from the truck. That eyelet/ring terminal is soldered to the main battery cable (not crimped!) with a poor solder joint (=Ford supplier bad QC). My '22 had it too, I kept it going for a long while with a simple hose clamp around it (!!) forcibly joining terminal and cable strands together which worked fine for like 9 months. Ultimately I made the effort getting it to the dealer and having the battery cable replaced. There's an official Ford campaign on this issue covering most (all?) '22 Maverick Hybrids (see below). There's a fair chance yours has the same issue as it is common on the '22s and the symptom is exactly what you describe: an out of the blue no-start situation, and jumping it takes care of it because the jump terminals are downstream of this cable eyelet.

Outside of that, installing that $140 AGM battery and bumping up the charge SOC to 100% should fix any low voltage issues going forward.

It certainly did for mine.

It is good to note that other Ford models also suffer from this issue as they are all trying to squeeze max. fuel economy out of these drivelines.

Cheers,

@mav47

Any chance you can pinpoint the eyelet/ring terminal location for me? I'm calling the dealer this morning and would at least like to be able to sound like I might know what I'm talking about. Thanks again, greatly appreciate it!

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[BlueSpec1]

@mav47

Any chance you can pinpoint the eyelet/ring terminal location for me? I'm calling the dealer this morning and would at least like to be able to sound like I might know what I'm talking about. Thanks again, greatly appreciate it!

Loose Crimp Lug was on left side of BJB, under the purple nut in this pict.

Some other person's service notes

Slightly different symptoms, the 300A fuse next to that lug had a Special Service Message.
SSM 52024
2020-2023 Escape, 2021-2023 Corsair, 2022-2023 Maverick –FHEV/PHEV – 12V Battery Voltage Low Or Discharged With DTC U3003:62 Stored In The DC/DC
https://ford.oemdtc.com/12464/fhev-...ord-escape-lincoln-corsair-2022-2023-maverick

 

[mav47]

@JPinMD

That main battery cable runs from the battery (under the rear seats) forward to the main fuse block located under the hood on the driver side inboard of the left front wheel.

The eyelet on that end of the cable is bolted to the fuse block, but is essentially barely connected to the cable itself. The eyelet to cable is wrapped in insulating tape though and really buried there, so it is hard to see if it is loose at all without removing it.

Because of that and because the connection is also intermittent I'm guessing dealers didn't really diagnose it and simply replaced it based on reported no-start symptoms and the vehicle being in the correct VIN range that had these bad cables installed.

I'll see if I can find a picture. I'll attach it here later if so. (Edit: @BlueSpec1 just posted detailed pictures above)

As a temporary fix I put a hose clamp around that taped end, essentially loosely clamping the eyelet to the cable, which lasted well enough for a long time, but is obviously not a permanent solution nor one that is recommended. It will get you by though.

Good luck!

 

[JPinMD]

@mav47

Any chance you can pinpoint the eyelet/ring terminal location for me? I'm calling the dealer this morning and would at least like to be able to sound like I might know what I'm talking about. Thanks again, greatly appreciate it!

@mav47

I'm bringing it in tomorrow. They said 22B39 doesn't apply to me but they are willing to check further when I come in. I believe it applies to me since my build dat was Jan 22

Loose Crimp Lug was on left side of BJB, under the purple nut in this pict.

Some other person's service notes

Slightly different symptoms, the 300A fuse next to that lug had a Special Service Message.
SSM 52024
2020-2023 Escape, 2021-2023 Corsair, 2022-2023 Maverick –FHEV/PHEV – 12V Battery Voltage Low Or Discharged With DTC U3003:62 Stored In The DC/DC
https://ford.oemdtc.com/12464/fhev-...ord-escape-lincoln-corsair-2022-2023-maverick

@mav47

Excellent, Thank You! We bring it in. tomorrow and hopefully they'll cover it. They told me on the phone that 22B39 doesn't apply to me but seeing how my build date was Jan 22 I believe it does and will "negotiate" with them. I also found TSB 22-2340 that covers it. Thanks again abd I'm sorry I have posted all this in probably the wrong thread but I sure appreciate the kind help!

Jim

 

[Suzukiridr14]

That's all I've done except I also put the truck on a battery maintainer when I won't be driving for a few days. I've used a maintainer on my truck, my lawnmower and on previous vehicles for years, to maintain long-term battery health.

I've never had my truck go in to deep sleep in 1.5 years of Hybrid ownership. Still have the original flooded lead-acid battery.

I have pasted my 3 year warranty with my Hibrid Maverick, and still have the battery it came with. I just live with the deep sleep notices, and pay no attention to them. I only drive 3500 miles a year, (I'm 84, and retired) and my truck sits days undriven. It has never failed to start, and the lights inside turn on as soon as I hit the push to start button. I will replace the battery with a AMG one when the time comes.

 

[Dad]

One year ago I got tired of the seemingly random deep sleep messages from my 2022 Maverick Hybrid Lariat, interior lights not working, etc.. I played a bit with the State of Charge (SOC) setting in Forscan (which is the only thing you can tweak), but that didn't seem to make any difference. I'd get deep sleep reports (indicating a low battery voltage) sometimes right after my 40 mile commute.

Upon reading reports on this forum, and since I have a professional background in vehicle electrical systems, I concluded that a 12V AGM battery could be the solution, I figured out that the Group 140R battery type is a drop in for the Maverick Hybrid, and I purchased and installed that UPlus Group 140R AGM battery which I think was $135 on Amazon in March 2024.

Here's a my original writeup about it: https://www.mavericktruckclub.com/f...ms-a-bit-high-while-driving.43755/post-771567

Besides the AGM install there's one more thing: I had raised the SOC setting in Forscan to 100% while trying to see if that would improve this issue well before that AGM install, and I simply left it there with the new AGM.

And after one of the taillight recalls was performed on the truck (which overwrites the BCM module with an updated version and reverts SOC back to 80%) I then raised it again to 100% (and again turned off double honk, turned on DRL taillights, etc. etc.). My reasoning: AGMs like to be charged to 100% regularly.

No other tweaks were done: Fordpass is connected and works fine, no trickle chargers were ever used. I just used the truck throughout the year.

ONE YEAR UPDATE:

I put about 25k miles on the truck since installing that AGM battery 12 months ago.

Essentially I have had ZERO (!!) deep sleep messages since then. The interior lights always work when entering, everything simply works as expected. Every day throughout summer and winter.

There was ONE deep sleep event that occurred about 11 months ago in April 2024, when we were on a family vacation abroad and the truck was parked for close to 3 weeks. After 16 days I got a message in Fordpass that the truck had entered deep sleep, which is exactly what this deep sleep feature is designed for as it prevents onboard systems from draining the battery so far that it might not start. This is normal.

It appears there are still many owners struggling with this 12V battery/deep sleep issue on their 2022-2024 Hybrids: so many messages on this forum are talking about investigating battery drain, connecting trickle chargers, owners are told to drive longer distances (?), people are pulling fuse 11, so disconnecting Fordpass connectivity, various battery replacements (with OEM flooded ones again!) most don't end up solving the issue. Overall: lots of hassles. I read of owners that actually SOLD their Maverick Hybrid because of this, and there are people that won't buy a Hybrid because of this problem.

At this point, based on my experience, I'd say that many might be overthinking this.


For me, the fix proved to be:

1) Install a Group 140R AGM battery

2) Raise SOC setting in Forscan to 100%



Cheers!

Yep, couldn't agree more. Seems we have pretty much tried everything else to no satisfactory end. I hope other members can take heed of your post and those of other members and save themselves time, expense, and effort trying to "fix" the unfixable. Just get a good AGM battery and move on to enjoying your Maverick rather than cursing it.

 

[NedF]

How is this a FIX when you are still getting deep sleep messages

I would accept the odd deep sleep if warranted due to lack of use etc., but I get a deep sleep message every time I shut the truck off. The app is useless to me!

 

[Mervin the Maverick]

One year ago I got tired of the seemingly random deep sleep messages from my 2022 Maverick Hybrid Lariat, interior lights not working, etc.. I played a bit with the State of Charge (SOC) setting in Forscan (which is the only thing you can tweak), but that didn't seem to make any difference. I'd get deep sleep reports (indicating a low battery voltage) sometimes right after my 40 mile commute.

Upon reading reports on this forum, and since I have a professional background in vehicle electrical systems, I concluded that a 12V AGM battery could be the solution, I figured out that the Group 140R battery type is a drop in for the Maverick Hybrid, and I purchased and installed that UPlus Group 140R AGM battery which I think was $135 on Amazon in March 2024.

Here's a my original writeup about it: https://www.mavericktruckclub.com/f...ms-a-bit-high-while-driving.43755/post-771567

Besides the AGM install there's one more thing: I had raised the SOC setting in Forscan to 100% while trying to see if that would improve this issue well before that AGM install, and I simply left it there with the new AGM.

And after one of the taillight recalls was performed on the truck (which overwrites the BCM module with an updated version and reverts SOC back to 80%) I then raised it again to 100% (and again turned off double honk, turned on DRL taillights, etc. etc.). My reasoning: AGMs like to be charged to 100% regularly.

No other tweaks were done: Fordpass is connected and works fine, no trickle chargers were ever used. I just used the truck throughout the year.

ONE YEAR UPDATE:

I put about 25k miles on the truck since installing that AGM battery 12 months ago.

Essentially I have had ZERO (!!) deep sleep messages since then. The interior lights always work when entering, everything simply works as expected. Every day throughout summer and winter.

There was ONE deep sleep event that occurred about 11 months ago in April 2024, when we were on a family vacation abroad and the truck was parked for close to 3 weeks. After 16 days I got a message in Fordpass that the truck had entered deep sleep, which is exactly what this deep sleep feature is designed for as it prevents onboard systems from draining the battery so far that it might not start. This is normal.

It appears there are still many owners struggling with this 12V battery/deep sleep issue on their 2022-2024 Hybrids: so many messages on this forum are talking about investigating battery drain, connecting trickle chargers, owners are told to drive longer distances (?), people are pulling fuse 11, so disconnecting Fordpass connectivity, various battery replacements (with OEM flooded ones again!) most don't end up solving the issue. Overall: lots of hassles. I read of owners that actually SOLD their Maverick Hybrid because of this, and there are people that won't buy a Hybrid because of this problem.

At this point, based on my experience, I'd say that many might be overthinking this.


For me, the fix proved to be:

1) Install a Group 140R AGM battery

2) Raise SOC setting in Forscan to 100%



Cheers!

I followed your link to the AGM Battery on Amazon, but it says it doesn’t fit a 2023 Ford Mavericks Hybrid. Should I trust Amazon or your link? I mean that honestly, not to start something. Thanks!

 

[mav47]

I followed your link to the AGM Battery on Amazon, but it says it doesn’t fit a 2023 Ford Mavericks Hybrid. Should I trust Amazon or your link? I mean that honestly, not to start something. Thanks!

@Mervin the Maverick


Look up my (I think second) post on page 1 of this thread.


Cheers!

 

[Cherokee]

I would accept the odd deep sleep if warranted due to lack of use etc., but I get a deep sleep message every time I shut the truck off. The app is useless to me!

Did you get an AGM and reset the charging profile to 100% ???

 

[Dad]

I would accept the odd deep sleep if warranted due to lack of use etc., but I get a deep sleep message every time I shut the truck off. The app is useless to me!

A member stated he got the deep sleep message with the AGM battery installed after the truck had been inoperative for 3 weeks. That seems reasonable. Are you saying you are getting deep sleep messages with an AGM battery installed? Is the truck in deep sleep or is it only a message on the Ford app? Trying help, not disclaim your experiences.

 

[NedF]

A member stated he got the deep sleep message with the AGM battery installed after the truck had been inoperative for 3 weeks. That seems reasonable. Are you saying you are getting deep sleep messages with an AGM battery installed? Is the truck in deep sleep or is it only a message on the Ford app? Trying help, not disclaim your experiences.

No, I still have the original Flooded Cell. I was just saying I would prefer to be in the same position as that member. I am trying to hold out for the fix so that I do not put a new battery through the same poor conditions as the original one. If they do not replace my battery when they do the fix I will spring for an AGM and move on and/ or if this battery fails to start my truck I will just pay for my own AGM if needed.

 

[Dad]

No, I still have the original Flooded Cell. I was just saying I would prefer to be in the same position as that member. I am trying to hold out for the fix so that I do not put a new battery through the same poor conditions as the original one. If they do not replace my battery when they do the fix I will spring for an AGM and move on and/ or if this battery fails to start my truck I will just pay for my own AGM if needed.

I understand. I would advise you to just get the AGM on your own. Amazon has them for about $130 and as I stated earlier, I've had no problems or issues with the truck since install. Why hassle the flooded cell and trying to screw around with a reluctant dealer? It's an easy install; no modifications and you can move on. Just saying and trying to save you future frustration.

 

[glohworm]

I understand. I would advise you to just get the AGM on your own. Amazon has them for about $130 and as I stated earlier, I've had no problems or issues with the truck since install. Why hassle the flooded cell and trying to screw around with a reluctant dealer? It's an easy install; no modifications and you can move on. Just saying and trying to save you future frustration.

I'm going to have to reluctantly disagree here. Due to this charging system and my 80 year old retired driving style, I've managed to sulfate both my OEM and subsequent AGM batteries. Latest episode was when I had recharged my UPlus AGM and was heading on a 20 mile drive to Hines VA hospital. I happened to look down at my voltmeter plugged into the cig receptacle. It read 12.8v and not the normal 15.0v! It dawned on me then that the battery was not accepting a charge from the DC/DC converter. It was reading 12.5v by the time I got home. Right now I have the OEM battery back installed after desulfating it. I ran my charger, with the repair mode, all night long on the AGM battery and it now reads 13.5v this morning. I ordered another AGM battery, this time a WEIZE H5, with more reserve capacity. I know it'll take a bit of modification. So be it.

 

[NedF]

I'm going to have to reluctantly disagree here. Due to this charging system and my 80 year old retired driving style, I've managed to sulfate both my OEM and subsequent AGM batteries. Latest episode was when I had recharged my UPlus AGM and was heading on a 20 mile drive to Hines VA hospital. I happened to look down at my voltmeter plugged into the cig receptacle. It read 12.8v and not the normal 15.0v! It dawned on me then that the battery was not accepting a charge from the DC/DC converter. It was reading 12.5v by the time I got home. Right now I have the OEM battery back installed after desulfating it. I ran my charger, with the repair mode, all night long on the AGM battery and it now reads 13.5v this morning. I ordered another AGM battery, this time a WEIZE H5, with more reserve capacity. I know it'll take a bit of modification. So be it.

My current driving style is very similar. My commute to work is about 12km (18 Mins) and I am less than 5 weeks away from retirement, so I don't want to subject a new battery to the same misuse the original has been enduring. I have some free time coming up (a week of vacation) so I was thinking I might put the battery through a reconditioning using my older B&D Battery Charger. I have never used that option on the charger. Do you remove the battery from the truck to do it and if so, will the truck lose some of the trip history and customized settings (steering wheel and head unit menus)?

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