You can in fact use a screwdriver to get the codes on a 4th gen max (OBDII), but on a 5th gen and newer it won't work. Just giving an instance of how to get them 🙂 In any case go to autozone, they'll pull your obdII for free. Call ahead to make sure your particular local one does it, but most do. DO NOT pay a mechanic unless you have to. They'll charge $60 and it takes a couple of minutes.