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Cel Codes P0171 & 0174 Too Lean

1759 Views 4 Replies 5 Participants Last post by  joe5.0, 
E
Any ideas here? Has been idling rough for a few days. Otherwise it runs fine. CEL came on yesterday. Had the codes pulled and says it's running lean.
80,000 miles
Oxy sensor, EGR valve?
Help!

Gary
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