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Why would my O2 and Catylist monitor read not ready?

(2002 Audi A4 Quattro)
in Beacon, NY on November 13, 2013
Problem was detected during NYS inspection. Also, car was recently in for service.
Displaying 1 answers & 1 comments
Popular Answer
of Greg's Orange Auto on November 13, 2013
poss worn out catt have it tested and also test o2 operation
on November 13, 2013
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