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PO 422 is killing me! V70-XC70 1999

posted by  jerzyk on  Thu Oct 20 13:37 CST 2005
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last visit: Sun Nov 23 05:54 CST 2008
[RELATED]

Guys,I need help ,PO422 keeps comin' back ,I replaced upstream o2 sensor[heater went after 119k miles] 4 months ago, downstream sensor is new also,no air leaks on the intake side[smoke machine shows nothing] and I had my cat conv. on the bench -white and clean like new.Right now I got124k on the clock,5W-40full synth.from beginning and so far no problems.I'm going out of ideas.Anybody...... please....






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