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P1476 - What Did My Diesel Do Now?

4K views 2 replies 2 participants last post by  CrispyChrisB 
#1 ·
Check engine light came on, Onstar gave me the above code. Month 38 of ownership with 35,500 miles on it.

Any insights as to what part/sensor failed? Otherwise I'll find out next week when I take it in.
 
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