Jeep fixed the P0304 problem by replacing the Cylinder heads, less than 1,000k miles ago.
CEl came back on today, Code was P0304 again. WTF???
Cycled through start cycle a dozen times, light did not come back on.
on the 14th start cycle, CEl is back on. P0304 again and the engine started to stumble.
No offense to people here, but what a piece a crap;
this is the last time I buy American car.
I have had over 30 cars and only 3 American 2 of them were Jeeps and they had major issues in short time vehicle was owned.