When was the last time you did this?

Start there. Check to see if your vac hoses have come off the DPFE sensor, if there was excessive backpressure that blew them off, that would explain the excessive/insufficient contradictory codes - or your EGR valve diaphram blew. If the hoses are off, you may have clogged precats.


Must be that jumbly-wumbly thing happening again.