I drop the codes and got 5 DTC's: 1) P0171 - Bank 1 too lean, 2) P0174 - Bank 2 too lean, 3) P1400 - Differential pressure feedback. EGR circuit low input,
4) P1405 - Differential pressure feedback sensor, Up stream hose off or plugged.
5) P1407 - Exhaust gas recirculation, no flow...