2005 3500 4x4 Auto. 135K

The issue I have been having recently is sporadic starting problems. It either starts just like it always has or it randomly just cranks and doesn’t start. When it doesn’t start the dash gauges don’t move when the key is in the on position or when cranking and there is a surging sound which I believe is the lift pump. A code that was pulled showed something was wrong with the fan.

The last time it did this I unplugged the fan and plugged it back in. It then started like normal but shortly after started doing the same thing again.

I do run a smarty JR and it seems like it has done this more when it’s programmed than when I remove the programming, but I can’t say that the smarty has anything to do with it for sure.

Anyone else experience this or have any ideas?

Thanks


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