2002 impala obd test no connection
I currently own a 2002 Impala LS. I recently had my battery die and it reset all my computer codes. I needed to get an emissions test and the OBD test showed not ready. I went and drove my car for a few days and went back to get retested and this time the OBD tester could not find a connection to my car. I check the fuse for the cig lighter and it was fine. What else could be causing thing problem. Any help would be great.