ok tonight i put a comp box on my truck and then the check engine light came on is it from just unplugging the map sensor real quick to switch it out with the comp plug in whats wrong? how do i get rid of the check engine light?

 

whats the code say

 

Use a code reader to remove the code. Stored codes will keep the light on.

 

ok i do not have a code scanner but my friend does.