Check Engine Light

[DHull]

I have a 2008 6. 7 2500 quad cab that has about 8600 miles on it. I really like the truck it is able to do everything and more than I was told when looking to buy. The only problem is the check engine light it has come on and been reset six times,the dealer says they are doing what Dodge is telling them to do. I have also been in contact with Dodge and they don't seem to be anymore help then the dealer. I'm new at this diesel game this is my first one.

 

[2Rowdy]

What code is it throwing. Turn key on and off 3 times quickly.