How do you pull the codes out of the 2012's?
Mine threw one this am with the espar on and was in a limp mode ,stuck in 4'th gear. Would like to know what it didn't like.

 

Code reader of some kind through the OBD2 port. Chances are it's O2 sensors.

 

Check engine light gone today.
Used espar prob 5hrs and no probs.
I have a H+S tuner @ home when I get time to delete. Can pull the codes then if I ever get there.
Can't really see how it can be the O2 sensor. Truck was not running when it happend. Then again these new rides.... who nows.

 

Turn your key from off to run 3 times ending in the run position without starting and the odometer will spit out all the codes. Then go over to the DTR wiki and there's an ENORMOUS list of all the codes and what they mean.

 

I guess I never took that option.