P0400 exhaust gas recirculation flow nissan altima P0400 Exhaust Gas Recirculation Flow Malfunction P0400 Exhaust Gas Recirculation Flow The code P0400 is set when the EGR system flow - On many 90's and early 00's Nissan vehicles (e.g.... Source Source Source Source Source Source Source Source Source Source Read Also: Nissan dtc p0400 Nissan 1.6 po400 code Nissan p0400 egr flow malfunction Nissan maxima p0400 egr flow malfunction 95 Nissan maxima p0400 Nissan hardbody p0400
