An OBD scanner will take a lot of the fear and mystery out of working on new cars. Some cars even display the codes without needing the scanner. Its not so bad. My car told me it needed a new crankshaft position sensor (Pxxx code). Who would have guessed? Instead of taking it to a shop, I ordered the part online, popped it on the car and its good as new.

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1985 380SE Blue/Blue - 230,000 miles
2012 Subaru Forester 5-speed
2005 Toyota Sienna
2004 Chrysler Sebring convertible
1999 Toyota Tacoma