Have car and an Android phone? Get one of these. : LifeProTips
Arthur Lozinski stashed this in Automobile
All cars built after 1996 in the USA have OBD II connection, so you can build an android app (or use an existing one) to monitor your car. I AM SO HAPPY!
Rats! After holding off for years, I just recently bought a hand-held scanner for $50 to get rid of alerts so that my old vehicle would smog check.