Ignoring a check engine light might feel harmless if the car still runs smoothly, but the warning signals more than a mi ...
Modern cars generate mountains of diagnostic data, and choosing the right OBD-II scanner can make the difference between guesswork and real fixes.
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.