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Discussion Starter · #1 ·
Yesterday my check engine light came on, I did just put a 1/2 tank of shell diesel in the truck, the light came on and twice the truck kind of studdered going up a hill on the freeway. I checked the gas cap, it was on tight, I got gas at another station and filled therest of the tank up and added STP diesel additive ( only kind they had) it is running fine now, all gauges are normal feels normal mileage the same or slightly better, but the engine light is still on, and yes I have cycled the ignition 3 times and the light is still on. Any ideas on what I can check before I pay a dealer to look at it? Thanks you for all the help.:squish
 

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if you got water, then your water in fuel light should come on. Go to your local advance and have them read the codes and see what it says...
 

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if it feels normal ide just drive it a little while to see if the DTC recycles its self off, if not get the code scanned to see whats going on.
 

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Discussion Starter · #5 ·
Thanks guys, I drove it a while and cycled the ignition 3 times and now the light is off and it runs fine, probably just some bad fuel.
 
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