DOES A 2001 MITSUBISHI ECLIPSE HAVE A DPFE SENSOR AND IF SO WHERE IS IT LOCATED?

What is your question?

I HAVE ASKED FOR HELP WITH THIS PROBLEM BEFORE...MY CHECK ENGINE LIGHT CONTINUES TO COME ON WITH A CODE OF PO401, WHICH IS INSUFFICIENT AIR FLOW. I HAVE HAD THE EGR SOLENOID, VALVE AND VACUUM HOSE REPLACED AND THE TUBING AND ORIFICE HAS BEEN CLEANED OF CARBON. RESEARCHING THE PROBLEM I READ WHERE THE DPFE SENSOR COULD BE THE PROBLEM, BUT MY MECHANIC SAID THERE WAS NO DPFE SENSOR IN A MITSUBISHI. IS THAT TRUE? COULD IT BE A COMPUTER ISSUE AND HOW DO YOU KNOW IF IT IS? PLEASE HELP I AM DESPERATE FOR ANSWERS.I HAVE USED THE MITSUBISHI DEALERSHIP AND PRECISION AUTO.