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    Re: After markets cats Archived Message

    Posted by Alan Kane on March 9, 2007, 8:55 am, in reply to "After markets cats"

    Hi Andy,

    When you say lean codes do you mean fuel trim codes, eg P0170?
    If the cats are restricted then they could cause this but as long as they are flowing free I think it is unlikely.
    Having said that, I find aftermarket cats troublesome as regards cat efficiency codes ie P0420.

    regards

    Alan

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