[COcoop]

So I hadn't driven my truck since coming home from work yesterday at noon. Tonight I started it up to run errands and the mil light came on. I stopped by autozone and pulled 3 codes U3FFF, p0700, p0562. Not quite sure what U3FFF is at all can't find it in the service manual or online anyone know what it could mean? I am guessing the other 2 have to do with my batteries since I had them come up before when I thought my batteries were bad after the first cold snap. Although my batteries tested fine at that time. Any help would be appreciated. Thanks guys
Chris


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[COcoop]

I know the U3fff is an invalid code just curious if anyone had it come up and actually found what it meant.


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[69GWC]

I know when my batteries were going out my truck was throwing out codes and had a cel on that would not clear. These trucks do weird stuff with low batteries.

 

[xcc_rider]

From what I'm reading I found 2 plausible answers.
1- battery disconnected within the last 50 key on cycles
2- an error from the scanner when reading the codes. This one I found several times and they recommend clearing the codes and reading the codes when/if. They come back

When you had your batteries tested, did they give you the amp draw for each of them or just tell you they're ok?
Sometimes they say ok when they handle a large amp draw but well under the 700 cca they should be.

 

[COcoop]

They just said they were ok. I think they are original batteries and it's an 2008. So I am sure it's time to swap them out. Just was hoping to make it till after new year so I could save a little money now, but probably need to bit the bullet this week and get new ones. Thanks for the input this is my first diesel and I love it just getting used to things!!


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