hope this helpsPlease post a picture of your “bigger battery”So I have the ecoboost fx4 2.0 and my truck since I got it would always go into deep sleep mode where times it didn’t even want to start I took it to ford they put a bigger battery in it and I have not have had a single issue with deep sleep since
I am thinking of the decades long problem where an average alternator does not recharge a 12v battery very fast when the vehicle is at idle in the driveway. The amps it takes to crank it to start are often not replaced by idling for quite some time. Going to have to idle for something like 45 minutes to an hour to regain the lost amps from cranking the engine that one time. The remote start tops out at 30 minutes, then locks you out and doesn't let you remote start again until you have "regular" started it with a key.
The hybrid uses the HV system to start. The 12V system is provided power and recharged by the DC-DC converter which steps down the HV to 12V. But the DC-DC converter is only active when the HV system has its contactor closed; so when the truck is in Ready [to Drive] or when the engine can start such as Remote Start.
Booooooooooo. Sounds like the "easy" solution to Deep Sleep would be to allow the HV to top off the 12v battery 24/7/365. But then if you drained the HV to a level that could permanently damage it.......$$$$$$ repair bill. So I get it.
Deep Sleep Mode may be a feature but mine is definitely telling me about problems that don't exist. All this will do is make me ignore it when it matters. I get these messages despite driving it daily. I get these messages WHILE I'm driving it. I have a 2022 XL Hybrid with 10,250 miles. I really like the truck and I've never had a problem with starting it or with powering any features. I'll tell the dealer next time I take it in, but this cannot be how it is supposed to work.
Very standard experience. At 12.1-12.2, the battery is already at 50% cpacity. As an RVer, we know to never allow our batteries to get discharged below the 50% level. But as long as it starts, I'm gradually becoming OK with it. That and I have plenty of warranty left, should it fail. Some folks have gotten dealers to install new batteriies even 3-4 times...which should be a hint that it is performing as designed.
In the Hybrids, we are pretty much always below 12.0 at the dash outlet when we shut off the truck before all the lights and such shut off.
The standard 12v in hybrid is EFB not AGM although some have reported that for scan shows their battery type as AGM. With the 2.0 EB mav having either the larger EFB or the AGM depending on availability when theirs was built it's possible maybe that confusion exists in the mix. Since dealer performed 23E09 and 23E07 updates my accessory on voltage shows 14.4-14.6v in dash power point monitor and 15.4-15.6v for much longer time than the ready status of 15.1-15.3 before those updates. However with warmer weather coming maybe the ready voltage will not be needed to be so high. From what I understand the AGM charge profile for most AGM should be fast charge up to 80% then taper off so that AGM will never be overcharged as that is kiss of death for AGM. If you do put a charger on your truck I suggest after it's charged to reset the BMS and then without starting put truck in the locked and not disturbed 6-8 hour battery learn procedure mentioned in manual. This should let the BMS know the fully charged voltage of battery and help it learn what type of battery is installed.
