Monday, September 14th, 2015 AT 4:13 PM
Engine running rough. I've tried collecting engine codes but the OBD II will not read them. Power comes on automatically when connected to the data link connection plug and I've checked the fuse. The unit says to check the connection. I've done that more than several times. I've even had both O'Reilly's and Autozone try and have had no luck. No one seems to have any answers.