Check charging system?
So I just installed some Mac LT's on my mustang. Of course the o2 sensor on the passenger side was way too short (upstream), and me being me decided to solder in some 20 gauge wire to extend them. Anyway, still getting the O2 sensor code but after the soldering job and after connecting everything back up, I'm still getting the o2 code, but now I get an intermittent engine hiccup and a "check charging system" notification for about 2 seconds. Only happens when cruising at consistent speed. Any ideas??