04 dodge diesel poo69 code

I have a 04 dodge 3500 diesel 4x4, I got the code poo69 when my check engine light came on last night. I got the code but have no idea what the code means I was hoping you could tell me so I can fix it. Thanks
P0069 MAP-BARO CORRELATION
YOU COULD OF OVER OILED YOUR AIR FILTER, THIS WILL COVER THE SENSOR WITH OIL AND CAUSE THIS CODE
REMOVE FILTER AND CHECK YOUR SENSOR AND CLEAN OFF ANY DEPOSITS OF OIL AND DUST
INDY