About an hour after I changed my oil my SES light came on. Probably not related to the oil change but I thought I'd share anyways. When I plug my OBD2 Reader in I get the message "LINK ERROR". Is there a certain way to connect the reader? I've tried reading the code with the key in aux position and on position. I feel like I've tried everything. The reader works fine on my M5 and all other cars. 2006 Full Size Supercharged. Thanks!