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

[JPinMD]

I do not get any deep sleep messages on my '22 Hybrid Lariat but what I have been getting randomly is no power at all. The first time it happened about 5 months ago, I jumped it with a battery booster pack and power came back on instantly. I replaced the battery with a non AGM battery from Auto Express and that solved the problem, for about 4 months. A few weeks ago the no power situation returned. We're able to get power back on by connecting the battery booster to the battery terminals and turning booster on. The truck power comes on instantly. This has happened with increased frequency, 4 times in the last 3 weeks, so today after reading this thread I ordered the H4 AGM battery and the ODB Forscan Adapter. I've read other threads with similar no power situations and there is no real definitive fix, could be a cable connector in the engine compartment, could be controller, could be this and that, could be all kinds of things, and all seem to mean leaving the truck at the dealer for what could be a very long time. This is our only vehicle so the AGM fix seems logical for cost reasons and the fact that sticking a boost on the battery for like 1 second fixes it. If this doesn't work I guess we'll try Plan B which if you ask my wife is "trade it in and buy a new one". I'll let you know how it goes. This is the only issue we've had with 75000+ miles on the truck.

Sponsored

 

[CD_SM]

Mav47...I thought I read on here that the Deep Sleep issue was only for 22's and 23's. Do the 24's see it also?

Yes.
Ford already replaced my battery once.

 

[CD_SM]

The PowerPoint Timeout issue is a key point. In addition to updating to an AGM battery, I noticed that the dashcam that I had hooked up to the 12v outlet was still on WAY after I turned the truck off. I had, up until that point, believed it turned off soon after the truck was turned off. I had enough experience to know that dashcams also drain the truck battery (happened with my previous truck). I no longer use the 12v outlet as a permanent hookup.

It's **supposed** to be on for quite a while after the truck is off, by deaign. It is the same circuit as the FlexBed (which is often used for cargo lights etc.). Actually, once the battery begins to get weak (but not weak enough to go to deep sleep) it will turn off immediately when you turn off the truck and open the door, as a power saving feature. That was the only symptom when my dealer replaced my truck's battery.

 

[4sambos]

I've had my '23 for a year and half. No problems. Do all of the models indicated always have or will have this problem?

A lot of folks experience this deep sleep issue and many on MTC

 

[HeyBales]

any guess at to why they set the threshold to 80 percent ? There was likely some rationale behind it but likely whatever benefit (S,?) they thought it would have were outweighed by the probs it caused

https://batteryuniversity.com/article/bu-403-charging-lead-acid

This is what the 80% probably represents.
And for a battery sitting in the cabin - probably matters more.

Except their reading of 80% is suspect, as well as how fast they drop the charging amps.

 

[HeyBales]

WOW, well I’ve had deep sleep issues which affected my FordPass app from being useless. So I went into the truck screen settings and eliminated any Sync of data going to Ford currently. Then I did the Battery Reset Sensor as stated above and verified the battery warning light flashed three times. This was all done Saturday night. As of today Monday noon I have been always able to use the FordPass app as normal with NO deep sleep issues noticed “yet”.
I am definitely not saying this is the fix but before I was to swap the stock battery out and replace it I wanted to at least try this and it has been working for a day and 1/2. Thanks everyone for all your input but Ford has a long standing known problem and they need to provide a fix please.

Did you have a new battery or at the least a fully charged battery when you did that routine for a new battery installed?

Or did you just do the routine on an already partially drained battery and told the truck this is the new high level to base your figures and routines on?

Bad idea if the latter.
It'll catch up as now it'll allow the battery to drain even more before it does it's routines to save enough juice for your next start.
You can read plenty of other posts on this negative effect.

 

[HeyBales]

I've had my '23 for a year and half. No problems. Do all of the models indicated always have or will have this problem?

All will have that feature, along with battery saver changes - to do exactly that - save the battery to allow another start.

 

[HeyBales]

WEIZE Platinum AGM Battery BCI Group 47-12v 60ah H5 Size 47 Automotive Battery $113.99

• is this the correct size for replacement?

No.

H4, 140R, or LN1.

All common sizes used on AGM style batteries that are an exact drop in replacement.

For FLA it would be T4, or 99R.

 

[HeyBales]

I do not get any deep sleep messages on my '22 Hybrid Lariat but what I have been getting randomly is no power at all. The first time it happened about 5 months ago, I jumped it with a battery booster pack and power came back on instantly. I replaced the battery with a non AGM battery from Auto Express and that solved the problem, for about 4 months. A few weeks ago the no power situation returned. We're able to get power back on by connecting the battery booster to the battery terminals and turning booster on. The truck power comes on instantly. This has happened with increased frequency, 4 times in the last 3 weeks, so today after reading this thread I ordered the H4 AGM battery and the ODB Forscan Adapter. I've read other threads with similar no power situations and there is no real definitive fix, could be a cable connector in the engine compartment, could be controller, could be this and that, could be all kinds of things, and all seem to mean leaving the truck at the dealer for what could be a very long time. This is our only vehicle so the AGM fix seems logical for cost reasons and the fact that sticking a boost on the battery for like 1 second fixes it. If this doesn't work I guess we'll try Plan B which if you ask my wife is "trade it in and buy a new one". I'll let you know how it goes. This is the only issue we've had with 75000+ miles on the truck.

A complete infrequent battery drain is different than what is being discussed.
But becoming more frequent is a wrong direction.

You do have an issue then, a true parasitic draw that sadly Ford sounds like they aren't pursuing anymore due to the time and expense to track down.
Your's is being handled by an SSM bulletin to techs.
That many miles not sure if the battery warranty would apply - but they would test your battery to confirm the drain hasn't killed it yet, and charge it up.
But the current solution is to wait for software upgrade that likely just cuts off whatever module is causing the drain, or resets it then cuts it off.

I'm guessing since you haven't gotten deep sleep warning you do not use the Fordpass app.
2 examples from MTC posters about similar drain - ended up being a bad TCU (modem) module that was staying engaged and drawing way too much power.
You might pull your fuse 11 to duplicate cutting power to it to see if it improves the situation - if so could take it in with that troubleshooting step already done.
That module probably out of warranty too though.

 

[mav47]

I do not get any deep sleep messages on my '22 Hybrid Lariat but what I have been getting randomly is no power at all. The first time it happened about 5 months ago, I jumped it with a battery booster pack and power came back on instantly. I replaced the battery with a non AGM battery from Auto Express and that solved the problem, for about 4 months. A few weeks ago the no power situation returned. We're able to get power back on by connecting the battery booster to the battery terminals and turning booster on. The truck power comes on instantly. This has happened with increased frequency, 4 times in the last 3 weeks, so today after reading this thread I ordered the H4 AGM battery and the ODB Forscan Adapter. I've read other threads with similar no power situations and there is no real definitive fix, could be a cable connector in the engine compartment, could be controller, could be this and that, could be all kinds of things, and all seem to mean leaving the truck at the dealer for what could be a very long time. This is our only vehicle so the AGM fix seems logical for cost reasons and the fact that sticking a boost on the battery for like 1 second fixes it. If this doesn't work I guess we'll try Plan B which if you ask my wife is "trade it in and buy a new one". I'll let you know how it goes. This is the only issue we've had with 75000+ miles on the truck.

@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,

 

[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,

Thanks for the info. I will contact the dealer with the information you provided and see what they say. I did not receive anything from the dealer about this issue in 2023 and since it says it expired in June 2024 I am hopeful they’ll work with me. Thanks again!

 

[Builder]

After a recent 4.5 hour drive, my AGM went from a 44% SOC to 84%. That’s the highest I’ve been able to charge the AGM thru driving. Installed AGM August 2024 and it performed well thru the New England winter. Even went as low as a 35% SOC and still had dome lights and start power.

 

[CurtisB]

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

The battery hasn't died and gets recharged. That's a fix to me. Plus, as soon as Ford does the software update, I think I'm good to go. I went through 2 flooded batteries in 2 months and now I am approaching a year with my AGM. I'm happy.

 

[Waterick]

.........
If you don't want deep sleep - then pull the TCU fuse since that already accomplishes it. You ain't getting remote access either way.

Pulling the TCU fuse will prevent you from seeing it (deep sleep) in writing on Ford Pass, but you will still (eventually) experience no courtesy lights and no proximity entry. I pulled the TCU fuse at six weeks old (to prevent this problem and for privacy) and experienced my first no courtesy lights at about 11 months age. Have trickle charged to full three times since. Truck is now almost 16 months old. My truck is not driven daily, but is regularly driven.

 

[HeyBales]

Pulling the TCU fuse will prevent you from seeing it (deep sleep) in writing on Ford Pass, but you will still (eventually) experience no courtesy lights and no proximity entry. I pulled the TCU fuse at six weeks old (to prevent this problem and for privacy) and experienced my first no courtesy lights at about 11 months age. Have trickle charged to full three times since. Truck is now almost 16 months old. My truck is not driven daily, but is regularly driven.

Just to use Ford's terms - that would be battery saver functions, which is spelled out in the manual and one of the warnings Fordpass may give someone.

Some also go straight to Deep Sleep mode being the warning.
I'm not sure why the differences. Perhaps keyless entry/start vs non.
Usually battery saver features kicking in proceeds the deep sleep.

I've not received one warning about battery saver in Fordpass - but I'm at the max on the functions, dome light off immediately once I open door, not on upon entry, ect.
But XLT, so no surprises with keyless entry not working since there is none.

But agree - no modem, no forewarning on battery saver starting on whatever models would warn you about that.

Sponsored