2002 Ford F-250 Super Duty Q&A

2002 Ford F-250 Super Duty Question: I pulled DTCs PO478 and PO 470. Exhaust back pressure codes. Is there an easy fi

DTC PO 478 and 470 back pressure codes. Is there an easy fix? Have a smog ck tomorrow -
Answer 1
possible EGR passages are clogged. -
Comment 1
I didn't mention it's a 7.3 Diesel -
Answer 2
could be egr valve or dpfe valve if applicable -
Comment 1
Oh, It's a 7.3 diesel -