I have a 2020 3.5 with 28k miles. Left work this morning and had 3 codes thrown. U0284 lost comm with active grille shutter, U0252 lost comm with lighting control module b (rear lights), and p0035 turbo bypass valve. I have a tuner so decided to clear them next time I got in my truck which was about 7 hrs later. Started my truck and got hill start assist not avail, service advancetrac, and pre collison not avail. On the dash warnings. Wtf is going on?

 

Get your battery tested.

 

you think its a battery dying issue?

 

Random errors like that from various sensors and circuits. It's possible. These trucks throw all kinds of strange messages at times. Lol. Won't hurt anything to have the battery tested.

 

Watch that code 0035. Its an open circuit code.
Smells like some kind of wiring damage!
Good luck.

 

Your truck doesn't even have a "lighting module b" so that is what is often called a sympathy DTC. Test the battery and replace if necessary. If it tests good, charge the battery overnight with a charger. Then clear the codes and see if any returns. My guess is either a bad battery or really low SOC (State of Charge).

 

Both bluegrass and 52merc have good observations. Besides those two ideas, the code (P0035) MAY indicate issues (shorted) with turbo bypass valve circuits that is acting as a energy drain on your battery (parasitic drain) causing the dash warnings.

 

yea I have to figure out where that is to check it out. Im getting my battery tested tonight

 

Apparently this is the part I need and noone local has it of course (excluding ford cause they are closed). Apparently my battery is good but does detect something draining it.

 

Well I finally found where the tbv was located and found that these wires that go to it are no longer together. Is it something I should fix or should I buy the new wires? If buy new wires what are they lol.