2008 Discovery w/350 Cummins check engine!
I have a (new to me this season) 2008 Discovery with a 350hp Cummins and on a longer grade the check engine! comes on and then it will go back off on its own a short time later, after it’s not pulling...
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Check engine pulling a hill is sometimes because of low coolant. I get that once in a while when coolant got a little low in the bottle. Have mine filled to MAX when cold and no more issues.
