code PO420

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04-29-14, 03:53 PM

shumif1

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code PO420

2001 RX300 120k miles.
I read that po420 is bank one , is that the front by the radiator or by firewall ? Should i just change the 02 censors

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04-29-14, 05:02 PM

salimshah

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Please read RX300 mega thread Having problems start here sticky for bank and location.

Salim

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05-05-14, 03:29 PM

shumif1

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Thanks, knew all that already, light went off 2 days ago .could i have gotten some bad gas ?

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05-05-14, 03:32 PM

hypervish

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Run a search, you will find find plenty of information.

That code tends to come and go till you fix the problem.

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