The Motopower OBD2 Car Code Reader is on sale for a mere $18, a 33% discount from its normal price of $27.

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.

The Motopower OBD2 Car Code Reader is 33% off at Walmart right now. Shoppers say it's "very easy to use" and offers peace of mind before visiting a mechanic.

A code reader for your car can mean the difference between dropping everything and heading for the mechanic and letting that warning light ride a little bit.

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.