Ford Ranger $7E8 Code
 

Hi
To everyone, this is my first time here just signed up.
I have a 2012 Ranger 2.2 deisel auto 2 wd.
I am getting a cog like light coming up on my dash periodically.
What do I need to do with it to make it go away properly
I have a code tester and it is coming up with $7E8
Do I need to take it to the experts or is there something easy to do my self?
Billaa