# Audi/VW Guys - 1.8T Problem **URL:** \ **Category:** PittSpeed Automotive\ **Created:** [November 6, 2008, 7:39am UTC](https://forums.speedlife.net/t/audi-vw-guys-1-8t-problem/200539 "2008-11-06T07:39:08Z")\ **Posts on this page:** 1\ **Showing post:** 22
**Author:** ![fah\_quad](https://avatars.discourse-cdn.com/v4/letter/f/ac91a4/32.png) [@fah\_quad](https://forums.speedlife.net/u/fah_quad)\ **Post date:** [November 19, 2008, 6:42am UTC](https://forums.speedlife.net/t/audi-vw-guys-1-8t-problem/200539/22 "2008-11-19T06:42:03Z")
> [@\*\*\*\*\*Official: Mighty Meet Thread\*\*\*\*\*](https://forums.speedlife.net/t/official-mighty-meet-thread/10918/2756): > > if your obd port will not read, chances are good that you have an aftermarket radio or not the correct radio for the car. starting in 97/98 vw/audi ran teh k line to +12 at teh radio. if you have an aftermarket or older stock radio–it shorts to ground and obd port will not work. > > if this is the case, have the radio wired in correctly and the obd port will read. it is pin 3 in the black plug off the oem wiring. remove it from the connector and \*\*\*\* will work. Yeah, however on newer Ross-Tech VAG COM’s and all dealer’s readers now, they’ve been able to bypass that problem even when the k-line is hooked up wrong. I remember having to show pictures of my stereo wiring to dealers, and assure them I knew about the k-line and bypassed it correctly, or else they wouldn’t hook my car up to their stuff. There was a time that an aftermarket radio, hooked up to the K-Line incorrectly, would blow out the dealer’s reader. The problem with Audi’s was that the aftermarket harness adapters didn’t hook the wiring up correctly. If the person installing knew about the k-line, though, they could just splice around that or reconfigure the harness. Hope that’s it here, though, as that’s a simple fix. --- _[View the full topic](https://forums.speedlife.net/t/audi-vw-guys-1-8t-problem/200539)._