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TANTO

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    larry

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  • Gender
    Male
  • Lexus Model
    rx-330
  • Lexus Year
    2005
  • Location
    Ohio (OH)

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  1. 2001 RX300, 80k miles, getting P0420 "catylist efficiency below threshold". As i have a hard time believing i have a bad cat with this mileage, I'm thinking about replaceing the rearmost A?F sensor, and then perhaps the others also. Comments please? I noticed there are several sensor brands available. Any of these to stay away from. First post. TIA
  2. 2001 RX300, 80k miles. Getting error code "catylyst efficiency below threshold bank. I'm having a hard time believing the cats are bad at this mileage. Thinking about replaceing the rearmost A/F sensor, and then perhaps the others if that doesn't work(?) Comments please? I notice several brands are available. Any thoughts on the brands? First post to the forum. TIA
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