Hello, I am a first proudly owner of an 05 nissan altima 2.5s. Just bought her last week ? I am not to much familiar with forums or how they work, but I only have one specific problem with my car and have been searching for answers days now. Maybe someone can help. My service engine light has came on, but one problem there is no obd-ll plug in the car. I am the 3rd owner so I guess the original owner took it out for unknown reasons. Ask the second owner and he didn't even know what it was so how can I find one of these?? I have looked on many websites, ebay, forums etc. The auto part store up the road can't tell me what's wrong with it until I can find something. Is there one on the engine? If so please let me know! P.s. don't want to take to a dealership to be charged for a simple computer diagnosis.