Why would my O2 and Catylist monitor read not ready? on 2002 Audi A4 Quattro

Problem was detected during NYS inspection. Also, car was recently in for service.

by in Beacon, NY on November 13, 2013
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1 answer 1 comment
ANSWER by , November 13, 2013
poss worn out catt have it tested and also test o2 operation
COMMENT by , November 13, 2013
Thanks!