upstream a/f o2 sensor

  1. Paul Lebow
    Thread

    Broken O2 sensor - great fuel economy! Why?

    Just got back my 2011 Gen 3 Prius 186K mi after a used JDM engine swap due to blown head gasket. Check engine light - P2238 on scanner: upstream...
    Thread by: Paul Lebow, Mar 21, 2023, 0 replies, in forum: Gen 3 Prius Technical Discussion
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