Hello,


I have a 2001 Audi TT Quattro. For some reason the OBD reader cannot connect to the car, so no pass on emission test

Here's some information and stuff I tried:
- the car has the original BOSE radio working, and station info is displayed on the dashboard
- engine check light is not on, and I can run the diagnostics from the dashboard, which prints OK at the end
- I checked all the fuses on the side panel
- I cleaned the OBD connector with contact cleaner
- tried 3 different OBD readers (emission test computer, handheld OBD reader at shop, and I have a simple OBD reader), they all error out
- I checked the K-line voltage between pins 4+7, reads 0.18 volts
- I do not have a VAG-COM
- the car was not driven for over a year (due to new babies in the house), the battery was dead so I replaced it

What else can I do to diagnose/fix this problem? I've seen some posts suggesting cleaning radio/HVAC connections.

A mechanic suggested that some cars need to go through certain number of startup/warmup cycles before the OBD works, not sure if that applies.

Should I get a VAG-COM?


Thanks so much,
-lajos

 

i have same problem, too. im thinking its about wiring... but i dunno how can i check it..

 

Did either of you have luck with this issue? I have having the exact same problem/symptoms.

 

I still have no solution. I got a vag-com, which can't connect to the car either.

 

i found problem maybe your problem is same, too..
i had a superchips on my car and i cannot connect to car with superchips..
now i changed my eprom and put different one, now i can connect in a second
im sooo happy... do u have something like this on car ?

 

Well, I'm not the first owner of the car, so it's possibility. Although this car has passed inspection since I got it (they need to connect to obd for smog), so I'm afraid I have a different issue.

But I'll check for superchip. Thanks for the tip!

 

I assume by now you have resolved this issue or sold your vehicle :-) What did you find out.

 

Check your wiring on the OBD connector. I believe I had a wire/pin that was loose in the connector. You might want to use a continuity tester/wand for this.

 

Does anybody find a solution for no link issue with the OBD II?

 

Old thread, but looking for help.
Wife's 2002 TT dies on road, and will crank, won't fire. I get there 20-30 minutes later, everything checks out, no obvious defects, she cranks it starts right away. we're three miles from home, drives home, and it dies on our lane. I grab my OBD tool, won't connect. about 20-30 minutes go by, and it connects, shows a P0322 code, and starts and we drive it to the house, I backed it into the garage and pull it onto a set of ramps.

Any idea if this is common? There is a relay that feeds the ECM, can it cause this issue. I am an old Cat mechanic, I have a preconceived notion that the power supply being cut to the ECM can throw an errant code, particularly speed/timing sensors.