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View Full Version : precat failure or bad o2 sensor? help



freppesito
06-12-2007, 09:05 AM
i have the yellow check engine lamp glowing and checked out the problem with vag.com.
the resault was , - precat low function -sporadical problem.

does that mean that my o2 sensor is bad or the precat itself is out.

please give me a hint.

A8. 4,2 year 2002

bOOOOstedAudi
06-12-2007, 03:06 PM
most likely just the o2 sensor