Hybrid Battery save mode.

[OLEO]

Your battery is sulphated, thanks to the BMS misprogramming that stops it from ever being fully charged. Flooded batteries need to sit at 95% charge or better to maximize their life. If all you have is a multimeter, that should look like 12.6-13.2V when parked overnight. Don't check it until it has been sitting for at least overnight, to leak off the surface charge. Checking the voltage is not the correct way to test a battery for the charge that it can hold, and the dealer should be using the correct battery tester instead. I guarantee that it would fail a normal load test. Your dealer needs to replace the battery (is it still under the 36mo warranty?), as it is now ruined.
The claim has been made that Ford is working on a software fix for this problem, due out sometime in 1Q2025. Meanwhile, keep getting new batteries. Mine lasted 13 months since manufacture, and yours is probably at 10-11 months including shipping time to the dealer.
If your dealer can't admit that the battery is damaged, get the Ford rep involved, and possibly move to a better dealer who actually trains their mechanics properly.

Your battery is sulphated, thanks to the BMS misprogramming that stops it from ever being fully charged. Flooded batteries need to sit at 95% charge or better to maximize their life. If all you have is a multimeter, that should look like 12.6-13.2V when parked overnight. Don't check it until it has been sitting for at least overnight, to leak off the surface charge. Checking the voltage is not the correct way to test a battery for the charge that it can hold, and the dealer should be using the correct battery tester instead. I guarantee that it would fail a normal load test. Your dealer needs to replace the battery (is it still under the 36mo warranty?), as it is now ruined.
The claim has been made that Ford is working on a software fix for this problem, due out sometime in 1Q2025. Meanwhile, keep getting new batteries. Mine lasted 13 months since manufacture, and yours is probably at 10-11 months including shipping time to the dealer.
If your dealer can't admit that the battery is damaged, get the Ford rep involved, and possibly move to a better dealer who actually trains their mechanics properly.

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[OLEO]

I am on my 3rd original Motorcraft battery. The service manager said Ford tells them to put the same recommended battery in. Ford must have a large stockpile of the Chinese batteries to use up. I have interior lights again, until the next one dies.

 

[Packer Bill]

Replace the battery to an agm,thats what i did, problem solved.

Make sure the AGM battery is NOT a Motorcraft battery! Motorcraft batteries are junk right now!!

 

[Gullzway]

Ford, in their great wisdom, decided on a 80% charge level limit for the battery. Using ForScan, I changed the level to 95% in my Maverick. I recommend this to all Maverick owners.

Did that to mine about 3 or 4 months ago.
Just got my first Deep Sleep message yesterday since the change.

 

[rknrbt]

Doubtful.
You have to take it to a Ford dealer and have them test it.
After about a 1 1/2 hour test, they told me mine was fine, and would start the truck. I asked them why it went into deep sleep everyday and they couldn't answer and also would not replace it.

Tell your dealer to read Special Service Message 53087.

 

[No Mav for Me]

I have this issue from new with my 2023. I did not drive it much the first few months and thought that was the issue. When i took it to the dealer they said there is no issue.. I have drive the truck 30 miles and parked it, an hour later i get the deep sleep mode message. I hate no dome light.

I checked my app and do not see a recall for the issue. Is there a recall/ fix?

 

[Mikes22Mav]

Make sure the AGM battery is NOT a Motorcraft battery! Motorcraft batteries are junk right now!!

To my knowledge, Motorcrap does not make an AGM battery the correct size for the Hybrid.
If you want an AGM that fits, you need to buy another brand.

I will be on my fifth battery as soon as I take it back in to the dealer again for the Deep Sleep issue.
In 2 1/2 years I only have 13k miles on it.

 

[The Real Maverick]

After a long drive, I had the radio on for about an hour.
Key to accessory but not run.
Got this:

 

[rknrbt]

Just had my 8 month old XLT Hybrid at the dealer regarding continual App message. Truck in Battery Saver mode. Please drive to refresh. Checked battery voltage and it is at 11.82 volts and dropping each week. Dealer reset BMS and said the battery is good. Got home and 3 hours later got the message again. Called dealer and they said nothing they could do ford Engineers working on a fix. I'll just have to get used to no Dome light, heat or AC at times and no remote start, until there is a fix. I asked , what happens when the battery goes dead. Do I have to replace it. He said I don't know. This has been going on for more than 2 months First every so often to now, every day. No matter how much I drive! Good luck all of you with this problem. I think I'm done with EV's of any kind.

23 days after Ford replaced with a new battery the same crap is happening again. This is so damn frustrating!

 

[Waterick]

Replace the battery to an agm,thats what i did, problem solved.

That, in itself, will not permanently solve your problem. Hopefully, Ford's fix will be here before your problems return. Mine have taken a year without Ford Pass and fuse eleven pulled, to manifest. Now I'm having to charge the battery due to no lights on entry. Volts measured upon entry almost always below 11.9 , sometimes as low as 11.3.

 

[GreyCacti]

Had my Hybrid 13 months and 19k miles on it. Original battery and never any battery issues.

Things I have done:

• Charged the 12v battery overnight, the first night of ownership. It had been un-driven for over a month from Built to Delivered date, and I figured the battery needed a full charge.
• Pulled fuse #11, disabling the battery-sucking Telematics unit.
• I put a NOCO battery tender on it whenever I won't be driving it for a few days. Then disconnect the tender, reset the BMS and don't drive it for 8 hrs afterward.
• Double lock it with the fob, every time I get out of it (even in the garage, which is annoying).

I have absolutely no idea if any of this has helped. But I've always been a believer in keeping lead-acid batteries mostly fully-charged, to prolong battery lifetime. I've also had OEM vehicle batteries last 7 years (aftermarket over 8 yrs) by doing battery maintenance.

Should we have to do all this? Hell no. And Ford needs to hurry up and fix whatever-TF is causing some of these trucks to not hold a proper charge, thereby shortening the battery life by sulfation.

Yeah, I don't think that all that is normal for a brand new truck.
I've never seen anything like this on vehicle.

 

[GreyCacti]

Why should I have to charge my battery. This is not a plug in EV.

Ford is getting us ready for the plugin model!

 

[GreyCacti]

Ford, in their great wisdom, decided on a 80% charge level limit for the battery. Using ForScan, I changed the level to 95% in my Maverick. I recommend this to all Maverick owners.

I don't have access to forscan. I bought it as an app on my phone, but it does not work like the laptop version.
Maybe the dealer will set them at 95 in the next coming fix

 

[CD_SM]

My very early 24 XLT hybrid has had the deep sleep exactly twice, both after my wife drove the truck. She always uses AC while I rarely do, and she probably sat parked for an hour or more with the truck and AC on both times. (Long story.)
However my battery is probably marginal, as the 12v in the dash and the FlexBed power turn off immediately now, without the delay they had when the truck was newer.
It did work for exactly one day after they did the taillight recall.
Guess I should try trickle charging it. Q: as long as I connect the charger under the hood I won't need to reset the BMS, right? Only if I charge the battery directly?

 

[Master Blaster]

My very early 24 XLT hybrid has had the deep sleep exactly twice, both after my wife drove the truck. She always uses AC while I rarely do, and she probably sat parked for an hour or more with the truck and AC on both times. (Long story.)
However my battery is probably marginal, as the 12v in the dash and the FlexBed power turn off immediately now, without the delay they had when the truck was newer.
It did work for exactly one day after they did the taillight recall.
Guess I should try trickle charging it. Q: as long as I connect the charger under the hood I won't need to reset the BMS, right? Only if I charge the battery directly?

Just get a replacement battery under the 3/36 warranty. Its obviously sulphated.

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