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If you have an egr valve failure why are you replacing th oxygen sensor? Most likley the EGR valve assembly is blocked or partially blocked. Often they build up exhaust deposits on the EGR valve and ports.
First answer by Redbeard. Last edit by Redbeard. Contributor trust: 1941 [recommend contributor]. Question popularity: 21 [recommend question]
Answers.com > Wiki Answers > Categories > Cars and Vehicles > Asian Cars > Acura > Acura TL > P0401 egr insufficient flow replaced oxy sensor runs 300 miles ck eng lite on 96 acura tl?
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1999 acura TL P0401?
