'09 Dodge Ram 2500

I have a Dodge Ram 2500 adn my check engine light goes on when I run biodiesel. I have apperently voided my warrenty after running more than 5% biodiesel. The check engine light does go off after running regular #2 diesel in it for a couple of days.
Am I harming my truck?
Does anyone else have this problem?

the problem is the blu tec

the problem is the blu tec system, it is not desinged for more than 5% bio. you will wash youre cylinders and fill youre crankcase with fuel. this is why i have not bought a new diesel since 2006. hope they fix that system soon. good luck. reliable resource recovery. free wvo pickup in wisconsin. 920-205-6071

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