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

[HeyBales]

OBDLink MX+ dongle readings at truck startup and shutdown. Great software package with access to all kinds of interesting and some obscure PIDs specifically identified for Ford Maverick. No Forscan changes. Driving patterns were unchanged during the winter with no extra idling. Absent a long duration drive ( which are very infrequent), SOC hangs around 65% -68% during this spring season so far; winter was lower by 10% to 20%. The 35% low winter SOC was unusual and not typical of readings (below zero weather and not driven for three days) ACDelco LN1 (H4) AGM. Resting voltage ranges from 12.6v to 12.8v.

So do you have these 4 PIDs shown below about charge/discharge available perhaps?

Curious where they have gotten to since 8/24 with your new battery - I'm assuming you did a BS reset at that time? (would show in BATTERY_AGE, not sure how the BATTAGEBECM is reset, or if that is the HVB)

Mine are now 16 charge, 14 discharge off, 3 discharge sleep. (come on BECM, make the charge at least match the discharge!)

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[Builder]

So do you have these 4 PIDs shown below about charge/discharge available perhaps?

Curious where they have gotten to since 8/24 with your new battery - I'm assuming you did a BS reset at that time? (would show in BATTERY_AGE, not sure how the BATTAGEBECM is reset, or if that is the HVB)

Mine are now 16 charge, 14 discharge off, 3 discharge sleep. (come on BECM, make the charge at least match the discharge!)

I’m not monitoring the four PIDs you mentioned but, I’ll take a look at what’s available. I was following hybrid battery age but I replaced that measure with a hybrid battery PID for amps and volts. I also follow hybrid battery temp. Charged the AGM for three days prior to install and did the BS reset, at install, then let it sit locked for 12 hours. The 12v charge is simply inadequate against the drain !!! Even the faster charge and slower discharge on an AGM is challenged by the Mav!!

 

[HeyBales]

I’m not monitoring the four PIDs you mentioned but, I’ll take a look at what’s available. I was following hybrid battery age but I replaced that measure with a hybrid battery PID for amps and volts. I also follow hybrid battery temp. Charged the AGM for three days prior to install and did the BS reset, at install, then let it sit locked for 12 hours. The 12v charge is simply inadequate against the drain !!! Even the faster charge and slower discharge on an AGM is challenged by the Mav!!

Ya those 4 PIDs are Ah's it appears from the calcs, so very slow changing. One look and not really useful again for awhile.

You should find the 12V battery Amps incoming if not a watched PID - see if you notice the same high 7-9 amps for maybe a couple minutes, 4-6 for several more, and then staying around 0-2 thereafter for a drive.
No wonder a 4.5 hr drive needed to see notable difference!

 

[Ozarkbeard]

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

Try disabling Mislock Chirp. It may (or may not) stop it.
Google (or search the truck's .pdf manual) for: mislock chirp

 

[MakinDoForNow]

Not until warmer here has resting V finally been at 12.0 or above, sometimes.
Had been down around 11.6 to 11.7.

I'm going for the warranty replacement to that slightly larger Reserved size you got.
Hopefully before 1.5 years in Oct.
Then expecting the replacement to to get close to 3 yrs.
Hopefully get another replacement under warranty.
Then I solar maintain it.

BMS actually got SOC up to 63% couple days ago, from the 50% abouts it was willing to hang out at during the winter.
It's own figures still show more discharge than charge, so not sure why it's not willing to give a few more amps during the drive, unless it thinks too cold still.

My Noco genius2 has been on the Rav4 for several weeks after warmer temps until last night - going to battery test tonight to see if SOH improved.

At 34 months my OEM 390 A battery tested OK but low needs charge with the handheld tester. I stated that I would have to put my noco g5 almost nightly and requested the "overnight" test. Service rep talked to mgr and asked me specific questions which I answered apparently well enough to qualify for the overnight test which has to be ran for warranty replacement. Result of test was a bad cell.
There was an F150 battery thread that had recommendation for a 4 amp maintainer as minimum due to the need to furnish current at times for the draws and still charge battery apparently uses the same BMS as most Ford's do. After the battery is to 80% the BMS drops the rate to 2amps and below. I can find that info if you want.

 

[HeyBales]

At 34 months my OEM 390 A battery tested OK but low needs charge with the handheld tester. I stated that I would have to put my noco g5 almost nightly and requested the "overnight" test. Service rep talked to mgr and asked me specific questions which I answered apparently well enough to qualify for the overnight test which has to be ran for warranty replacement. Result of test was a bad cell.
There was an F150 battery thread that had recommendation for a 4 amp maintainer as minimum due to the need to furnish current at times for the draws and still charge battery apparently uses the same BMS as most Ford's do. After the battery is to 80% the BMS drops the rate to 2amps and below. I can find that info if you want.

You did supply it at some point - it was a good read and seemed to fit what was seen.

Good advice on the battery test. I already figured the quickie they might do in the service pull-thru lane (like the quickie alignment test), would not be enough.
Didn't realize the warranty test was that much longer. I guess they want to fully charge and see if it holds overnight, then load test with their big tester.

 

[MakinDoForNow]

You did supply it at some point - it was a good read and seemed to fit what was seen.

Good advice on the battery test. I already figured the quickie they might do in the service pull-thru lane (like the quickie alignment test), would not be enough.
Didn't realize the warranty test was that much longer. I guess they want to fully charge and see if it holds overnight, then load test with their big tester.

There was someone that posted that his dealer got approval from Ford (engineering?) to run the overnight test multiple times while disconnecting different modules each time searching for which was causing the random draws. I think they finally replaced the Telematic control unit. Do not know if that actually cured his problem but they kept his truck for over a week furnishing him a ride.

 

[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!

Did your UPLUS have a plug in the vent hole where the tube connects? I didn’t check before I got the battery installed, and I really don’t want to pull it out again to pull the plug if there is one.

 

[Mervin the Maverick]

Did your UPLUS have a plug in the vent hole where the tube connects? I didn’t check before I got the battery installed, and I really don’t want to pull it out again to pull the plug if there is one

 

[mav47]

Did your UPLUS have a plug in the vent hole where the tube connects? I didn’t check before I got the battery installed, and I really don’t want to pull it out again to pull the plug if there is one

@Mervin the Maverick

This is just by memory from over a year ago: if I recall correctly, the Uplus comes with two vent ports, one on each side. One side you use for the vent hose with the OEM vent fitting. The other side will get a blank plug to close it.

 

[NedF]

@Mervin the Maverick

This is just by memory from over a year ago: if I recall correctly, the Uplus comes with two vent ports, one on each side. One side you use for the vent hose with the OEM vent fitting. The other side will get a blank plug to close it.

The ACDelco I just installed had a vent plug molded into the red (+) post cover. You had to break it off and install it on the opposite side to the hole you used for the vent tube.

 

[TheSEARCH]

The ACDelco I just installed had a vent plug molded into the red (+) post cover. You had to break it off and install it on the opposite side to the hole you used for the vent tube.

Good to know. If I do buy a AGM don't get AC delco. I don't want to have to break things off to use vent whole, I assume other batteries this is not necessary ?

 

[MakinDoForNow]

Good to know. If I do buy a AGM don't get AC delco. I don't want to have to break things off to use vent whole, I assume other batteries this is not necessary ?

It's just molded into the red positive post cover so that it is still with the battery when the buyer knows which of the two vent holes needs to be blocked. It's also possible that someone has a vehicle which has vent tubes for both ends of batteries and it will not be needed. Be glad it's still with the battery.

 

[HeyBales]

Good to know. If I do buy a AGM don't get AC delco. I don't want to have to break things off to use vent whole, I assume other batteries this is not necessary ?

Some of them have both vent holes plugged and you have to open it on the correct side with something sharp.

Breaking off a plug to push into the correct side is much easier.

None of the battery makers know which side your vent tube is on - you will always have to do something.

Or leave it venting into cabin. I'm sure no issues there.

(then again, the current BMS won't have a chance to overcharge it, so no current issue)

 

[Lone Star Proud]

Did your UPLUS have a plug in the vent hole where the tube connects? I didn’t check before I got the battery installed, and I really don’t want to pull it out again to pull the plug if there is one

I installed mine today. The Uplus has a vent hole on both sides. They included a small plug which i used to plug up the unused vent hole on the positive side of the battery. The negative side has the ford vent tube attached.

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