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Cel Codes P0171 & 0174 Too Lean

1760 Views 4 Replies 5 Participants Last post by  joe5.0
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?

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I had that code a while back. I think it was because of the extreme cold and the fact that I had only made 5 mile trips back and forth to work. It had been about a month and a half since the car had been fully warmed up. I've been making lots of highway trips lately and the problem hasn't come back.
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