like almost everything new today your car has a computer and if its 1996 or newer it has an OBD2 port which is onboard diagnostics second-generation, than codes can be read easily.
A good OBD2 code scanner can read and clear error codes.
The main thing most look at is how the engine is running which can be done by scanning the computer codes.
When you get a check engine light it can makes you feel like, what does that that mean? Why cant it simply tell you more?
As you can see using a scan tool makes things easier than troubleshooting from nothing and give you an idea what is wrong and where to start.
Something that is also commonly done is simply Google the code and your vehicle model and year and read through the forums to get a idea what others have done to solve the problem.
There will be times when a problem is too complex to fix for the average DIY backyard mechanic, but for the easy fixes such as O2 sensor the Pocket-Scan can be a nice money saver.
The Actron CP9125 PocketScan Code Reader really is a nice inexpensive easy way to to read your codes and give you some knowledge whether to repair it yourself, or take it to the shop.
*This post contains affiliate links.
Read More Reviews Here On Amazon
Actron CP9125 C PocketScan Code Reader for 1996 and Newer Vehicles – Orange