Once upon a time, you could diagnose the culprit of your Mazda MX-5 Miata's check engine light with a paperclip. We now use OBD-II technology for that.

Add Yahoo as a preferred source to see more of our stories on Google. Not so long ago, before software and electronics became so integrated, investigating car trouble and tuning performance was a ...

OBD Auto Doctor app reads car diagnostic codes for $15 total cost versus $150+ dealer visits, turning check engine light ...