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Need help with onboard diagnostics

1K views 11 replies 4 participants last post by  fnkychkn 
#1 ·
Hello everyone,

I apologize if this has already been discussed somewhere, I searched and could not find it. This also tells me that I should probably know how to do this, but don't.

Can someone help me with some instructions on how to perform an onboard diagnostics? My check engine light came on today at 240 miles.

Thanks!
 
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