Question about 2004 Audi A4

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Audi a4 2006 1.6 from last night a yellow warning indicator lamp is on indicating that there is a problem at the catalyst (according to the manual) It is not ticking and i dont see any other problems in the engine When i bought the car i noticed that the old owner change the catalyst last year What does it mean?

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Check to see if an aftermarket cat was put on and on this model it has to have a stock one

Posted on Dec 29, 2010

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