Hello all,
I have a 2003 Audi a4 1.8T Quattro. I have brought it to an Audi dealership and two other independent dealerships to fix this problem and no luck. It seems no one can diagnose it, but I still am unable to pass inspection. I have a "Not ready" Catalytic converter monitor which is causing me to fail. Both o2 sensors were replaced (front one on 9/21/2014 and the other about a year ago) and its reading that the cat is working properly. No check engine codes have been thrown, the car runs 100%, just the monitor will not ready. Have driven over 500 miles and tried to force ready the monitor through VAG-Tech and no luck. Is it possible that it could need a new catalytic converter when no codes are being thrown? If I knew where this monitor was located maybe its possible to replace because it's faulty? Could it be the ECU even though nothing else seems to be having a problem? It's stumping me and many mechanics and is apparently a rare problem. I have looked all over the internet and seems no one has had a problem like this. Any help or suggestions would be very much appreciated.

 

If you have the full version of VAGCOM VCDS you can force it to be ready. not a generic code reader, but a true VCDS full version. If you have had the battery disconnected for awhile, it may have 'lost' it's readiness code...will not show any fault codes, but will not pass inspection.

Here's a thread on how to do it.

AGAIN, if you have the FULL, AUTHENTIC version of VCDS software, you can generate a readiness code.

http://www.justanswer.com/audi/1s58s...s-it-runs.html

Just want you to know that a NORMAL code reader at an auto shop will NOT be able to fix this! You have to follow the procedure to a 'T', or again, use the ORIGINAL VCDS software!