I have noticed the same thing I did not notice it till I unplugged it, to put a performance module in it. And I cleaned it with elect. Parts cleaner and blew it out with blow gun. And my truck will run but it starts hard and idles bad. As a dealership mechanic I have replace PCM's before and the reason they ask for a grand it's because the factory mopar parts are $800 and up. But this is a first for me. I don't know what else to do other than

 

I moved your post into a new thread.

For the oil, check your power steering pressure switch. It's a very common problem and the oil will wick up through the harness into the PCM connectors and the O2 sensor harness.