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About ohiodriver

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  • Lexus Model
    2003 RX300
  1. Have had this vehicle for a little over a year, 2 days ago the CEL and VSC lights came on, Auto Zone scan shows P0420 code,Catalyst efficiency below threshold bank 1. Any ideas where I should start looking, I guess this thing has a "Warm-up converter" downstream of each bank so maybe it is simply a bad sensor? One more note to add, when we first attached the Scan Tool it could not communicate with the on-board diagnostics, turned out the 7.5 amp fuse for the OBD was blown, any ideas? So far am not having any drive-ability issues.