DTCs While Cold Weather Driving

[FerkinBlonco]

(Note: dated updates to this original post are located at the bottom of the post)

Well, my bronc threw some DTCs and went into limp mode when I was about 70 miles into a trip out of Fairbanks, AK. Temps throughout the drive were between -5 and -25F. All hwy speeds / 2wd. Went into limp mode and thankfully was able to get back to town. Figured I’d write this stuff down… for science. Will see what the dealer says on Monday and report back after.

P0236
P061A
P061B
P0236
U0401
U0415 (appeared after clearing other codes on 4MAR2024)
(2 door base, 2.3/manual, '22MY)

Shots of the DTCs from my rig, 2MAR2024:

3MAR2024 update:
I perused the forums an found a few related posts to the above DTCs. I thought I would collect them here for future reference.

P0236
https://www.bronco6g.com/forum/thre...-malfunction-reduced-power.34806/post-1214497
TL;DR: suspect loose wiring. Performed SSM 50148 "loose improperly seated connector behind glovebox".

https://www.bronco6g.com/forum/thre...freezing-temps-2021-bd-2-7.87252/post-2157923
TL;DR, replaced turbo boost sensor (MAF)

P061A / B
Didn't find posts on A. P061B:
https://www.bronco6g.com/forum/threads/the-boreal-badlands.48235/post-1858958
TL;DR, suspect frozen throttle body

U0401
https://www.bronco6g.com/forum/thre...essor-now-multiple-codes-and-limp-mode.71101/
TL;DR, dealer fixed by replacing wires under dash with insulation that had rubbed away

My Thoughts So Far
It's a bit odd to have the image processing module throw off a code (U0401) and get a few powertrain codes at the same time. Just as Boreal mentioned in a reply to this post, I'm leaning towards something wiring related. Hopefully the dealer can shed some more light on this tomorrow!

4MAR2024 Update
Well I started 'er up today to drive down to Seekins Ford in Fairbanks. It ran well, no more reduced power mode, although the CEL was still illuminated. I spoke to the service desk, mentioned it was no longer in reduced power mode, and they scheduled me for their next available slot. Apparently they're slammed so that's gonna be early April... hope nobody is hanging on my every word here.

In the mean time the svc advisor thought it'd be a good idea to clear the DTCs and see if they come up again. So I got home and used FORScan to clear things. They didn't immediately pop back up, although I got a new code after the first clear attempt, U0415:00-2F, but it went away after the 2nd clear.

Update 24APR2024
Still no return DTCs, even after a few thousand miles of driving. I’ll post again if these return when it gets cold next winter, I’m guessing these are related to driving in colder weather (they happened when it was below -20F this last time).

I ended up cancelling my early April dealer appt. They recommended that I try clearing the DTCs and seeing if they returned. I cancelled once it became clear that they weren’t coming back right away.

Sponsored

 

[Boreal]

I’d wager on a loose connector/bad pin fit!

Keep us updated.

 

[Bellime]

Do share, please

 

[EOSeabee]

I was wheeling in some pretty deep snow a few weeks ago and got an error on my sway bar disconnect. Sway bar disconnect was not engaged at the time. After we stopped for lunch, about an hour, I started the Bronco up and the error was gone and didn't come back. My theory is the snow got in there and messed something up, then melted away.

 

[Bellime]

I was wheeling in some pretty deep snow a few weeks ago and got an error on my sway bar disconnect. Sway bar disconnect was not engaged at the time. After we stopped for lunch, about an hour, I started the Bronco up and the error was gone and didn't come back. My theory is the snow got in there and messed something up, then melted away.

Check your wiring and connections.

 

[FerkinBlonco]

I was wheeling in some pretty deep snow a few weeks ago and got an error on my sway bar disconnect. Sway bar disconnect was not engaged at the time. After we stopped for lunch, about an hour, I started the Bronco up and the error was gone and didn't come back. My theory is the snow got in there and messed something up, then melted away.

I follow "LUCYTHEBRONCO" on IG and they recently had a sta-bar issue too, from the looks of it. Apparently it leaked and dealer resolved by replacing the sta-bar. (edit: I gather that one didn't go away on its own like yours did, though)

Sponsored