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 fault code on oxygen sensors is one of the most time-consuming fault codes to diagnose. So take your time and don't get discouraged.

Q: I have a 1996 Corvette that gave me a recurring fault code (P0171 - "System Too Lean, Bank One") for more than a year. The code reader on my scanner indicated that the fuel pump was defective ...

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.