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.

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

It just so happens that my personal car has had a check engine light illuminated for quite a few weeks now. Below is a video test and review, using the FIXD code reader for the first time.

As a rule, automakers see software in a car as a means to an end. Even Tesla, as cutting edge as it may be, is only willing to give its code so much attention. However, China's Geely wants to see ...

Having a hard time interpreting the car codes your dashboard is displaying? Car codes can be confusing, so here are the best OBD2 scanners for reading, analyzing and clearing diagnostic trouble ...

You can scan a barcode with your iPhone by using a third-party app. Currently, there are no built-in apps that can read barcodes.

Start, unlock and warm your car with Viper SmartStart iPhone app.

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.