Difference between code reader and code scanner

A code reader is very similar to a scanner, but it’s only capable of reading codes. A scanner tool is much more advanced allowing you to do more such diagnostics, resetting trouble codes and more. 

SRS Airbag Codes, descriptions and causes.

After getting the vehicle scanned, it is always best to double check the codes that you’re getting online and doing some research.

The scan will give you a description, but some of theses descriptions do have multiple causes.