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P0400 Diagnostic Trouble Code Discussion for April 2007

Exhaust Gas Recirculation System Flow Malfunction

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Trouble Ticket Help Requests for DTC P0400
Help Request Posted
1996 Nissan Quest GXE 3.0L Poor Fuel Economy, MIL Lamp on VIN: 4N2D11W7TD
P0400: EGR System Recirculation Flow. ... this car has two codes p0400 for egr flow and other one is knock sens. i pull the wiring diagram and found that solenoid is used for both egr and evap.The ecm grounds the solenoid to prevent egr operation but the ecm nev...
April 02, 2007
1995 Nissan Altima GLE 2.4L MIL Lamp on VIN: 1N4BU31D0S
P0400: egr system malfunction. This vehicle has a repeated p0400 code returning after a while. We have changed the egr valve, control solenois and vecuum valve in three different services. The light keeps returning. Vacuum checked valve and the vehicle stalls. Power and ground controls chec...
April 06, 2007
1995 Nissan Altima SE 2.4L MIL Lamp on VIN: 1N4BV31D1S
P0400: . ... here with a reacuring P0400 egr flow problem. I have played with these nissan egr system and understand how they work. The vsv is working cause my egr temp voltage drops to under a volt so the valve is working. the back presure tranducer is brand new from ...
April 09, 2007