Robb1121

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Robb
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2021 F150 3.5 Ecoboost
My truck did this 2 days in a row. After the second time it was throwing a transmission error code. Dealer had for 2 weeks. They called today and said they replaced some computer control board and appears to be working now. They are delivery to me today. We will see if issue is resolved going forward.
 

KBKEITH

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2021 F-150 XLT SCREW 5.5, FX4, 2.7EB
My truck did this 2 days in a row. After the second time it was throwing a transmission error code. Dealer had for 2 weeks. They called today and said they replaced some computer control board and appears to be working now. They are delivery to me today. We will see if issue is resolved going forward.
I sure hope that solves your particular problem.
 

Goose2

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Scott
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Idaho
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I had a new Chevy a few years back that did the same thing. Dead to the world. After being at the dealer for a week they could not find anything wrong but decided to put a new battery in it and after that no problem so there is hope that the battery is the problem.
 

Wakevictim

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Stephen
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Juneau AK
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2021 XLT 3.5L eb
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Military
Haven’t had my new F-150 for more than two weeks and experiencing the “phantom battery drain”. Anyone else having this dead battery issue? I’m hoping someone in my remote Alaskan town can help solve the issue.
0048E34F-ACC1-48A2-9CF5-082785F3A93A.jpeg
 

KBKEITH

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Yep, there’s a couple of threads running already on this topic.
 

Robb1121

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Robb
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Got my truck buck from the dealer yesterday after they had it for 2 weeks for testing for the Phantom Battery issue, and was throwing codes for a Powertrain Malfunction. Dealer ended up replacing the PCM. Per the service report part replaced was "ML3Z 12A650 GVB". Will report back if I still have issue.
 

ZWARRIOR

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David
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California
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F250
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Software Engineer
Anyone remember the jump start thing Bob recommended us buy back in November? dude is a prophet

I did buy one, its very nice.
 

GeorgeK

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George
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Massachusetts
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21 F150 Lariat
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Self employed
I was having the same battery issues and I brought it to the dealership and they reflashed the heated mirrors/ tow module and now my windows don’t go up with one touch anymore they go down fine just have to hold the switch to go back up annoying

AF733120-5118-4B66-8D9A-302790CB4314.jpeg
 

fordman2112

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Danny
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Southern Maryland
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2021 F150 Lariat, Carbonized Gray, 5.0, 502A
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retired
I was having the same battery issues and I brought it to the dealership and they reflashed the heated mirrors/ tow module and now my windows don’t go up with one touch anymore they go down fine just have to hold the switch to go back up annoying

AF733120-5118-4B66-8D9A-302790CB4314.jpeg
Read the manual about how to reset the one touch. Looks really easy.
 

cakryg

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Chris
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NY
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2004 Tundra
I was having the same battery issues and I brought it to the dealership and they reflashed the heated mirrors/ tow module and now my windows don’t go up with one touch anymore they go down fine just have to hold the switch to go back up annoying

AF733120-5118-4B66-8D9A-302790CB4314.jpeg
This is because they forgot to restore your vehicles settings after the reflash. Same thing happened to me and my power folding mirrors were turned off. Luckily he still had my settings in his tool and restored everything.
 

cakryg

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Chris
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It also happened to me 2 days after a recall that i just had done. Luckily for me i have a jump pack ;-)
Jmarc, did you bring it in again? What was the 2nd fix?
 

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