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P2238 code, A/F or o2 sensor?

Discussion in 'Other Toyota Vehicles' started by Jonny Rotten, Aug 16, 2021.

  1. Aug 16, 2021 at 8:13 AM
    #1
    Jonny Rotten

    Jonny Rotten [OP] New Member

    Joined:
    May 29, 2021
    Member:
    #63655
    Messages:
    71
    Gender:
    Male
    2004 Camry
    I have a 2238 code Bank one sensor 1
    How do I know if it's a Air fuel sensor in manifold or an upstream o2 sensor

    I can't find an answer online

    Anyway to diagnose with scan tool?
    I don't believe my scanner has an o2 test but I think it has 02 volts and short and long trim
    Pretty sure this is the first vehicle I've owned (worked on) that has an A/F sensor. Normally it's just your basic 4 o2 sensors

    EDIT: B1 S1 o2 volts read 3.2 which I believe is in spec
     
    Last edited: Aug 16, 2021
  2. Aug 18, 2021 at 5:35 AM
    #2
    Jonny Rotten

    Jonny Rotten [OP] New Member

    Joined:
    May 29, 2021
    Member:
    #63655
    Messages:
    71
    Gender:
    Male
    For anyone interested it was the A/F sensor. I called Denso and they said the A/F would be listed on the scanner as B1 S1 and the upstream sensor would Be B1 S2 and the downstream would be B1 S3.

    I'm not sure how much I'm believing that as I've never seen a B3 on a scanner but I don't change these every day either

    Either way it's fixed :D
     

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