Here is a handy tool that lets you read diagnostic trouble codes and keep an eye on your car’s condition on your Android phone, tablet, or computer. The Ozzy Gear OBD II Bluetooth Diagnostic Scanner works with all 1996 and newer cars & trucks (not counting hybrid vehicles). It does not require batteries or cables and has an app that lets you access the data on your smart device.
The Ozzy Gear Bluetooth Scanner lets you track your car data in real time. It shows engine load measurements, accelerator pedal positions, incoming air temperature, and other data. Sets you back under $25 at this time.