Imagine quickly diagnosing why your car's check engine light is on. A scan tool, also known as a trouble code reader, can help you identify the problem yourself.

Nearly all TTAC readers and writers have wrenched on a vehicle equipped with the OBD-II diagnostic system. Having a handheld code reader in yer box of tools can help douse that infernal check ...

Like most code readers, the FIXD module plugs into your vehicles OBD-II port and uses Bluetooth to connect to your phone. The App will connect to your car and give you all the current information.

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Most code readers should also be able to clear codes, meaning you can erase whatever trouble code the car has logged to trigger the warning light in question.

Which brings up the question, just because you can buy a cheap code reader and scan your own car, should you? The answer is both yes and no.