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Old 03-24-2013, 03:25 PM
irishguy irishguy is offline
Junior Member
Join Date: Mar 2013
Posts: 1
Default 2009 9-7x 4.2i code p0411

okay heres my problem i got this code a while back p0411 so i changed the smog pump not knowing if that what it was had the codes cleared out then the next day the check engine light came on again so i had the codes ran again same thing but now the pump doesnt turn on every cold start so now i am wondering would it be the check valve that is bad.
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