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Code: P0420 bank 1 troubleshoot: Pre-purchase check

Discussion in '1st Gen. Tacomas (1995-2004)' started by Mrguitarguy01, Apr 23, 2018.

  1. Apr 23, 2018 at 12:18 PM
    #1
    Mrguitarguy01

    #1
    Mrguitarguy01 [OP] Well-Known Member

    Joined:
    Nov 6, 2016
    Member:
    #201695
    Messages:
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    Yes, I searched.

    I am getting this code. As per my research,

    1) Change the sensor. Bank 1 is the A/F sensor (Denso 234-9003). I believe bank 2 is the O2 sensor (
    $61 Denso 234-4189 Oxygen Sensor
    Denso 234-4189 Oxygen Sensor) as per my research http://www.lieblweb.com/o2replacement.html . I did not change the 02. Should I have?

    So I changed the sensor and the light came back.

    2) Check for an exhaust leak and change the Cat Converter.

    Does anyone have an updated Cat Converter part number or recommendation?

    Per this thread: https://www.tacomaworld.com/threads/good-alternate-to-1200-toyota-oem-cat-converter.224243/ they say go with a few brands, but that was in 2012. Any recommendations?
     
    Mrguitarguy01, Apr 23, 2018
    #1

Products Discussed in

Denso 234-4189 Oxygen Sensor
$60.51
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