Using an OBD scan tool you can track down engine problems through your car’s engine control computer, then send the results to your smartphone.
If you’ve ever wanted to know what's going on in your car's engine control computer, this handy tool lets you peek inside. Just plug the sensor (BlueDriver; sold at lemurmonitors.com) into the onboard diagnostic (OBD-II) port on your vehicle. The unit sends data right to your smartphone via its Bluetooth interface.
Use the free software iPhone app (there's an Android app in the works) to get generic powertrain (P) trouble codes, ABS codes (for some domestic vehicles), interactive gauges and logs.
Or, buy subscriptions individually to unlock premium features like these:
Plug the obd scan tool into your car’s onboard diagnostic port. The data is then sent via Bluetooth to your smartphone.