See the thing is I am tuned but that was to my 2.5" everything and I was dumb to think everything would be the same and alright...Thanks everyone for the responses and trying the solve the problem just as fast as I was trying!

 

So what do the codes actually mean? Was their any damage made?

 

When check engine goes off or flashes or whatever a code is released...This code is in turn stored and an OBD II Scanner will read the code adn the number reveal what triggered the check engine at that specific point...If you go to an autozone they have the scanner and they check cars for free if you ever need to get the codes pulled! No damages done to the car as far as looking at the codes and watching and listening to car idle and run...Same old car

 

If you want to be really sure, check the compression AND leakdown.

Not trying to scare you, but on my old motor, after the CEL flash, we checked leakdown and it was at 16% in cyl #2. Turned out to be a chipped piston and the cylinder wall was scored all the way down.

I never had any CELs before that incident.