BMW 330 TROUBLE CODE

The Service Engine Soon Light Was On. I Got The Po313 Code. What Does That Mean? Is It A Serious Issue? Can Some One Please Help Me?

Po103 Comes Up Upon Initial Start Up. Code Cleared Thru Scanner Then Reappears After Restart.

I Have 2 Codes That Are The Same P111f & P0070. Air Temp Sensor. The Problem Is That This Car Does Not Require This Part. It Has A Dummy...