When you scan for your Check Engine Light, a list of codes will appear displaying the Primary Code as the first code. A display of parts that you can purchase to clear your MIL Check Engine Light is also shown.

You only need additional information for the first code since the primary code is the code that turns on your check engine light.

Selecting any code below the Primary code in the list will not allow you to open the code for additional information. This is because these codes are secondary codes that do not need to be fixed. When you resolve the primary code first, it may resolve the rest of the codes. You do not need additional fixes for all the extra codes below the primary code.