Dealer says they've never heard of Maverick battery problems

[HeyBales]

When Ford rumored they were come out with the 25 Hybrid AWD they stated it would have a larger battery to handle the load of AWD and that the MPG would increase. Originally I thought the increase battery size would be the hybrid battery itself, now I am thinking they were refering to the 12 volt battery. Which battery were they talking about?

Sure that was Ford rumors, and not people thinking motor on the back that would benefit from bigger HVB?

A bigger 12V battery would do nothing for AWD, it clicks a relay to engage the HVB to start the truck, and keeps the transmitters/receivers on, and alarm.

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[bk101]

We all know dealers never ever LIE.

I took it to the dealership yesterday for my 3rd battery replacement in under 5000 miles and they pretended like it wasn’t a common issue or that ford even acknowledged there’s a problem with mavericks draining batteries. I think I’m going to take a loss and trade mine for something else

 

[Packer Bill]

I took it to the dealership yesterday for my 3rd battery replacement in under 5000 miles and they pretended like it wasn’t a common issue or that ford even acknowledged there’s a problem with mavericks draining batteries. I think I’m going to take a loss and trade mine for something else

Why not get an AGM battery yourself? Many of us have done this...I know we should not have to do this but Maverick has been a great pick-up other than the battery issue for me.

 

[bk101]

Why not get an AGM battery yourself? Many of us have done this...I know we should not have to do this but Maverick has been a great pick-up other than the battery issue for me.

I feel like that’s just a temporary patch to the problem. If the truck is draining the battery even an AGM battery will die. Plus at 1000 miles I had a check engine light too for an exhaust system sensor. I do love the truck when it works but having it randomly not start when I’m trying to get to work not ideal. I don’t know if I trust the reliability of it anymore

 

[Dcooke35]

I may end up doing that after I get my new 2024 Mav, the dealer can't sell it to me because it is under the backup cam recall, just like my current 24 Mav I own. What is odd, is after I went to the dealership, my truck has not gone into sleep mode. I drove it home Monday night my usual 15 miles from work, and it has been sitting in my drive since. It is still not gone into the deep sleep mode. These last 2 nights have been the coldest of the year. I am baffled?

 

[HeyBales]

I may end up doing that after I get my new 2024 Mav, the dealer can't sell it to me because it is under the backup cam recall, just like my current 24 Mav I own. What is odd, is after I went to the dealership, my truck has not gone into sleep mode. I drove it home Monday night my usual 15 miles from work, and it has been sitting in my drive since. It is still not gone into the deep sleep mode. These last 2 nights have been the coldest of the year. I am baffled?

Did they recharge and test the battery? (that's the correct order, after a disconnect from system that may have reset some modules)

Did it sit 8 hrs locked after they did that?

Deep sleep only occurs if SOC is 50% or less, or 9.5 V or less, or 14 days undriven.
If they charged up battery recently - give it time.

 

[Master Blaster]

. . .
Deep sleep only occurs if SOC is 50% or less, or 9.5 V or less, or 14 days undriven.
If they charged up battery recently - give it time.

FYI, the faulty BMS is giving an 80% charge, or 12.46V when measured instead of the proper 12.70V of a 100% charge. A 50% charge on the flooded battery type should give you a voltage of 12.20V, not 9.5V. The battery preservation mode seems to kick in at about 12.0V, or 25% charge. Where did you get the 9.5V number?

 

[Builder]

Did they recharge and test the battery? (that's the correct order, after a disconnect from system that may have reset some modules)

Did it sit 8 hrs locked after they did that?

Deep sleep only occurs if SOC is 50% or less, or 9.5 V or less, or 14 days undriven.
If they charged up battery recently - give it time.

What’s confusing to me is that my AGM SOC has dropped as low as 45% recently yet I still get dome lights and it starts right up ….. no deep sleep. Voltage was around 11.5v. This was after a couple very cold days/nights with no driving. AGM recovered quickly after a short drive.

 

[HeyBales]

FYI, the faulty BMS is giving an 80% charge, or 12.46V when measured instead of the proper 12.70V of a 100% charge. A 50% charge on the flooded battery type should give you a voltage of 12.20V, not 9.5V. The battery preservation mode seems to kick in at about 12.0V, or 25% charge. Where did you get the 9.5V number?

Well, my comment is a few "or's" - so if any one of them applies - not that they all equal each other.

And yes - my BCM is reporting 11.7 most mornings now before charge, and calling that a SOC of 50-51% - BMS has their values very messed up from industry standards.

I do NOT get the Deep Sleep mode though - I do get most of the battery saver functions though. The 2 are different, despite most posters putting them together. DS is only turning off the TCU.

https://www.ford.com/support/how-to...y-does-my-ford-vehicle-enter-deep-sleep-mode/

https://static.nhtsa.gov/odi/tsbs/2023/MC-10233738-0001.pdf

Deep Sleep Mode message is expected if the vehicle has not been started for 14 consecutive days, battery voltage is at/below 9.5 volts or the body control module (BCM) 12 volt battery state of charge (SoC) drops below 50%.

 

[HeyBales]

What’s confusing to me is that my AGM SOC has dropped as low as 45% recently yet I still get dome lights and it starts right up ….. no deep sleep. Voltage was around 11.5v. This was after a couple very cold days/nights with no driving. AGM recovered quickly after a short drive.

Is it the battery charger reporting 45%? or something else?
Won't be accurate for awhile after charging in that case.

And even the BMS calculated SOC is skewed based on their silly algorithm.

The battery saver changes seem to be based on resting Volts.
How long do your lights stay on after door close?
Or power plugs getting juice?

My plugs are off as soon as I open door. Used to be on for that 75-90 min, never timed the max.
My lights are on for couple seconds after door lock, or several more seconds on door close no lock.
On entry the lights are off pretty quick on door close, don't always notice since outside and daylight. Or lately on remote start.

 

[Dcooke35]

Did they recharge and test the battery? (that's the correct order, after a disconnect from system that may have reset some modules)

Did it sit 8 hrs locked after they did that?

Deep sleep only occurs if SOC is 50% or less, or 9.5 V or less, or 14 days undriven.
If they charged up battery recently - give it time.

They did not touch it. I went for an appointment at 8:30 am, the guy said they were gonna need it for 4 days. He acted like he was not aware of a battery issue with the Maverick, I said nevermind, and drove it to work. Drove home at the end of the day, and here we are. I would get a notification daily about 30 minutes after driving that certain function would not work, and to drive my truck to get it to work again. Its been 2 days, and is still holding.

 

[Builder]

Is it the battery charger reporting 45%? or something else?
Won't be accurate for awhile after charging in that case.

And even the BMS calculated SOC is skewed based on their silly algorithm.

The battery saver changes seem to be based on resting Volts.
How long do your lights stay on after door close?
Or power plugs getting juice?

My plugs are off as soon as I open door. Used to be on for that 75-90 min, never timed the max.
My lights are on for couple seconds after door lock, or several more seconds on door close no lock.
On entry the lights are off pretty quick on door close, don't always notice since outside and daylight. Or lately on remote start.

I use my OBDLink dongle to read several measures including 12v and hybrid battery SOC. I’ve turned off all telematics but did not pull #11 fuse. Double click when exiting so exterior lights go off right away. Fully charged my new AGM for 3 days prior to install, completed BMS reset, and Mav locked and sat for 12+ hours. BMS SOC must be screwy because if I attach my Genius10 when the SOC is <50%, the Genius10 lights up to a full charge status within 2-3 minutes. Still can’t get the SOC past 72%. No sleep issues since my AGM install in August. Just odd measures that don’t seem to jive with how Mav is operating.

 

[HeyBales]

I use my OBDLink dongle to read several measures including 12v and hybrid battery SOC. I’ve turned off all telematics but did not pull #11 fuse. Double click when exiting so exterior lights go off right away. Fully charged my new AGM for 3 days prior to install, completed BMS reset, and Mav locked and sat for 12+ hours. BMS SOC must be screwy because if I attach my Genius10 when the SOC is <50%, the Genius10 lights up to a full charge status within 2-3 minutes. Still can’t get the SOC past 72%. No sleep issues since my AGM install in August. Just odd measures that don’t seem to jive with how Mav is operating.

I'm sure the BMS SOC value is purely calculated.
During the 8-hr learn estimate an Ah value, much like battery testers gets a reading from low level draw. Even though there is a BCM PID for that, no way to enter the value on a self-maintenance item like a battery replace. So problem is no compare between reading and battery claimed. logged amps out at low value over extended time, watching for drop in V, can estimate battery Ah.
Use the V reading on 1st start, along with BS temp, if off-time long enough.
Let the BS watch the Ah charge and discharge from battery.
Using battery age, and change in V from a known amount of charging at certain temp, estimate a SOC value.

It's evident it doesn't use the industry method of Volts = SOC%.

But a whole lot of trust in sensors reading things correctly.
And since decisions on charging rate and battery save functions seem to be related to the SOC%, scary that it's likely off.

https://batteryuniversity.com/article/bu-903-how-to-measure-state-of-charge

 

[cannon]

Majority of dealers hate warranty work. I'm not surprised. They would rather charge Bob their $150/hr+ rate , premium on parts for non warranty work than get whatever Ford pays them.

Wouldn't be surprised if most service advisors also work on commission.

Just wait for the fix. Should be here soon and in the meantime ask your dealer to perhaps check Oasis or Fords PUBLIC bulletin for nearly all TSBs!

I see this assumption quite often, Ford pays our shop $165.25/hr for warranty work and we charge walk in customers $170/hr. Shops don't hate warranty work, it pays pretty well.

 

[lonewoof]

Truck has been in sleep mode after sitting in garage for less than two days.

I called the dealer and they said they had never heard of maverick battery problems!

Yep got the same answer from my dealer. Ford San Leandro. Service advisor even said he had a 22 Hybrid Mav and never had issues...

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