I have an issue with my sprinter that I use for my business, and I have not been able to use it for a month due to a failed emissions test and I am getting desperate. The dealer I use is making appointments for the end of September, and I cant wait that long. Here is whats going on. The van failed the emissions test because they can not get a reading about emissions from the ODB II port. The port does have power to it. The last shop I took it too had the same problem I had. The check engine light is on, but no codes are being listed, and the light cant be reset. Does this sound like an actual problem with the port, or just sub par scanners. I see a scanner section, and I am ok with the price of most of the ones I see, but want to make sure this is a scanner problem before I buy one. Has anyone else had this problem and used a specific scanner to solve it?