F250 ELECTRICAL!!!
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3rd Gear
Joined: Feb 2025
Posts: 3
Likes: 4
F250 ELECTRICAL!!!
We had a hard freeze in the south down to 5 degrees. My truck wouldn't start that morning because of a myriad of abs and advance trac alarms. I changed a faulty battery in the truck and my problems went away. They came back and I changed out a highly corroded battery terminal. Again, this fixed my problem for about 2 weeks of daily driving between 50 and 150 miles. Now I have a check engine light with codes u0101 u0106 p0884 u0100-00 communication with tcm and ecm. As well as glow plug 1. The autozone code reader fix is can-bus wiring. It just doesn't add up. I don't understand why the freeze set this off. Doesn't seem like coincidence and I don't understand why the battery issues i resolved temporarily fixed my issue. Has anyone else had and similar issues? Or can anyone provide some guidance.
Logistics Pro
Joined: Mar 2005
Posts: 3,528
Likes: 2,493
From: West Michigan
Did you buy the truck new, or used? If used do you know the history? Just wondering based on your comments of corrosion, this truck might have gotten a salt water bath during a hurricane or flood in the south?
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3rd Gear
Joined: Feb 2025
Posts: 3
Likes: 4
Fixed
2017 Lariat F250 4x4 6.7 It was a long road and I forgot about the thread but I discovered when the hvac was on it would kill power to my tcm causing the truck to not know if it were in drive or neutral or park etc. Starting was also intermittent. Come to find out by a jam up mechanic that water had drained down into one of the harnesses (above drivers side wheel well in the front) got into the plug froze and basically exploded the plug causing all sorts of com wire exposure and corrosion. That was the fix.
Tuned
Joined: Nov 2020
Posts: 355
Likes: 85
From: South Georgia
Glad you had someone take the time to find a simple solution. I had problems with mine that turned out to be a broken wire at a connector pin. Caused faults and shut stuff off. Took the tech 4 hours to trace it and 5 minutes to fix. $450 well spent considering what some places would have sold me. So many of these types of problems are simple it just takes time to find it.
Lead Driver
Joined: Nov 2005
Posts: 8,458
Likes: 4,955
Older diesels were mechanical fuel injection, so that would be your analog one.
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