Description
OBD-II Trouble Code Description for P0401 Nissan
Exhaust Gas Recirculation Flow Insufficient Detected
What does this mean?
OBD2 Code P0401 Nissan definition:
EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor EGR (DPFE). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0401 Nissan code means that OBD detected an insufficient amount of EGR.
Symptoms
Possible sumptoms of OBD code P0401 Nissan
You may notice drivability problems such as pinging (a.k.a. pre-ignition knock) when the engine is under load or the vehicle is at higher speeds. There may also be other symptoms.
Causes
Possible causes of OBD code P0401 Nissan
A code P0401 Nissan most likely means one or more of the following has happened: ?The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced ?There is a blockage in the EGR (tube), most likely carbon buildup ?The EGR valve is faulty ?The EGR valve may not be opening due to a lack of vaccuum
Possible Solutions
In fixing this code, it is quite common for people to just replace the EGR valve only to have the OBD code return. The EGR valve is not always the culprit. ?Use a vacuum pump and pull the EGR valve open while monitoring engine RPM’s & DPFE voltage. There should be a noticable difference in RPM’s with the EGR open ?Clean out the EGR valve and/or tubing to remove deposits ?Check the voltage at the DPFE, compare to specified values (refer to a repair manual for your specific model) ?Replace the DPFE sensor (with a good quality / OEM one) ?Replace the EGR valve
The OBD2 Code Information Be Applicable For Nissan:
2013 Nissan Pathfinder,2013 Nissan Murano,2013 Nissan Juke Nismo,2013 Nissan GT-R,2013 Nissan Altima Sedan,2013 Nissan Almera,2013 Nissan 370Z,2012 Nissan Tiida,2012 Nissan Sunny,2012 Nissan Qashqai,2012 Nissan Murano,2012 Nissan Micra ELLE,2012 Nissan Micra DIG-S,2012 Nissan Maxima,2012 Nissan Juke Shiro,2012 Nissan GT-R,2012 Nissan Extrem Concept,2011 Nissan X-Trail,2011 Nissan Rogue,2011 Nissan Quest,2011 Nissan Pivo 3 Concept,2011 Nissan Patrol,2011 Nissan Murano,2011 Nissan Micra,2011 Nissan LEAF,2011 Nissan Juke,2011 Nissan GT-R,2011 Nissan 370Z,2010 Nissan Qashqai,2010 Nissan Pathfinder,2010 Nissan Navara,2010 Nissan NV200,2010 Nissan GT-R SpecV,2010 Nissan Cube,2010 Nissan Altima Sedan,2010 Nissan Altima Coupe,2010 Nissan 370Z Roadster,2009 Nissan Xterra,2009 Nissan Pixo,2009 Nissan Note,2009 Nissan Murano,2009 Nissan Maxima,2009 Nissan Frontier,2009 Nissan 370Z,2008 Nissan X-Trail,2008 Nissan Rogue,2008 Nissan Pathfinder,2008 Nissan GT-R,2007 Nissan Sentra SE-R,2007 Nissan Mixim,2007 Nissan Altima,2006 Nissan Urge Concept,2006 Nissan Note,2006 Nissan 350Z,2005 Nissan Zaroot Concept,2005 Nissan Xterra,2005 Nissan Terrano,2005 Nissan Sport Concept,2005 Nissan Primera,2005 Nissan Pivo Concept,2005 Nissan Pickup,2005 Nissan Patrol,2005 Nissan Pathfinder,2005 Nissan Micra,2005 Nissan Altima,2004 Nissan Titan,2004 Nissan Tiida
Note:
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