2023 f150 rattler 3.5 - 28k miles, bought used at 15k

Truck has been clearing the trip meter and resetting my display settings if I sit with the accessory on for even a short period. Maybe 5 minutes. Now I’ve noticed pre collision is turning itself off and on randomly while I drive. Today the entertainment screen said something like “ f150 saved “ and something along the lines of “truck locked” before freezing on a white screen then turning off when I shut the truck off.

Automatic updates are off. I unplugged the modem a month or so after I bought it. Checked resting battery voltage at 12.4, so close to normal. Is the factory model h6 as best I can tell. Don’t know if dealer replaced it when I bought used but doubt it.

battery issue or is it the api module? (believe that’s the module that runs all the display and dash). Anyone seen something similar?

 

Only thought is the Battery may be in a state of high Sulfation and reduced reserve capacity.
It won't show on Battery charge voltage, only under Current Drain loads.
Sulfation is the Electrolyte has crystalized on Cell surfaces and become inactive as a loss of Cell Capacity.
If a Charger is used that has a Re-conditioning Program, much of this can be reverse and Capacity recovered.
It converts the crystallization back to Lead.
This could offer extra Battery life and or prove the Battery had the condition and decision to replace it or not.
I just did this on my 3-1/2-year-old Battery and sure did the job.
Next crank start was dame near instant from the lower Battery total Resistance. (high improved Reserve Capacity, regained).
This operation should be considered about once every 6 months to lengthen the life of the Battery.
Good luck.

 

I should not do this but here is some info no one ever talks about.
No AGM regardless of size should ever be (normally) charged above 14.9 volts from the Alternator or Charger. This automatically results in extended charge time on either a Charger or from extended drive cycles. Sound like it might be an issue to some, you bet!.
BMS program cannot control an external Charger. It will take at least 6 hours of total Quiet time for the BMS program to adjust to the new State Of Charge. It does not change instantly.
Changing Battery size, the BMS must have a Program change to tell it a different capacity Battery is in place. It cannot tell otherwise and needs the program updated to reflect same. Hint it takes even longer charge time to recover a larger Battery. ...A BMS re-set does not take the place of a proper Program change. only controls the Battery as its program dictates. The Sensor on the Negative post has a Micro Processor that collects data, formats it in Digital form and sends it to the BMS over a dedicated Bus.
There is no flaw in the program operation as some guess at although some changes can be made at times with a TSB application.
BMS on 2011 to 2017 is different than 2018 on.
Chargers: not advisable to use a Trickle size charger. It does not have enough charge Current capability.
Use a 4 Amp size or larger. The AGM Charger Program will not allow over charging and will get the job done in a shorter time. An 8 to 10 Amp is even better.
Basis for this is the Amp Hour rating of the Battery. An h6 is rated 74 ah. A charge range or 8 amps is >one tenth< of 74 ah = 8 amps.. A good safe charge level to use without overheating the Battery Cells that have a temperature limit of about 145 degrees.
Battery RC or reserve capacity for an h6 is in the 140 amp range when new. This is important for such times as winter cold cranking time without the Battery giving up cranking power to soon. Remember, as the Battery temperature drops, the Battery capacity also drops with it.
.
A lot to know instead of just going round and round on the subject.
Good luck.

 

What's your source regarding changing battery size in BMS programing? I changed from H6 to H7 and am being told there is no way to tell the BMS what size the battery is. Thanks Jim

 

I did a 94R a few weeks ago. has not seemed to have any ill effects, and i don't get that battery save message any longer, no bms reset since replaced. I'm happy with that, attributed the problem in my mind as being due to sitting at the factory awaiting parts during chip shortage, and the fact i don't drive it daily. but i've been wrong before.

 

picked up an odyssey H8, threw it on and like others have said, truck seemed totally different. even down to how fast the display items cycled. will assume this has fixed it for now and follow up with any other issues. verified stock h6 was def having problems this am before I hit up the store. resting voltage was 11.99 that crawled up to 12.1. Napa has 20% off batteries with code smoothride if anyone else needs one. for the Odyssey that took off $70.

For the bms guys, I just did the reset. My understanding is that there is no selection in forescan for battery size, just type which stock is agm. Reset it and run it. checked battery as it ran, started at 13.5 then after a few minutes went up to 14.4 at the cables.

 

It is not unusual for an F150 voltage to be at 15, or slightly above that, following start up including after a period of not being driven for several days. It won't last long, but it is normal.

OP says nothing about usage or driving habits. Those may well be causing his concerns. Ditto the modifications he's made to the truck.

 

3rd truck, sits most of the week then gets a 70-100 mile trip on the highway. Modifications? None have been made.

 

You need to understand two things.
1.If the truck needs a Maintainer charger to keep it available when needed, ok but.........
2. The BMS may not be able to track the Battery State of Charge (all the time) because the Maintainer is interfering much of the time with the SOC.
Truck charging is also interred with.
Been there and know this.
Nothing works instantly but over a time interval to >>normalize.
This is why drive time is so important and charger finish and sleep time is needed.
Good luck.

 

1. maintainer has never been on the truck. Not sure what you’re talking about. On the wrong thread?

2. again no maintainer has been on the trucks never said I use a maintainer?

I am aware drive time is an issue that’s why we drive it the way we do when we use it.