08 gc stammering pinging... Egr circuit high, low, and open p403,p406,p125. Insufficient coolant temp for closed loop fuel control, there were more codes that I cleared it didn't save map sensor, bar out of range, cylinder 1 mis, multiple, miss, did the van just scrap itself? Is there a way to test the pcm... And. Could the egr cause all of this? Any help would be appreciated I don't know where to begin... Mechanic of necessity

 

It could be a corroded connector, see this post: https://dodgeforum.com/forum/dodge-c...ml#post3339161 and this thread: https://dodgeforum.com/forum/dodge-c...ml#post3326838