Description
OBD-II Trouble Code Description for P0401 Hyundai
Exhaust Gas Recirculation Flow Insufficient Detected
What does this mean?
OBD2 Code P0401 Hyundai 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 Hyundai code means that OBD detected an insufficient amount of EGR.
Symptoms
Possible sumptoms of OBD code P0401 Hyundai
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 Hyundai
A code P0401 Hyundai 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 Hyundai:
2013 Hyundai i30,2013 Hyundai i20,2013 Hyundai Santa Fe,2013 Hyundai Langdong,2013 Hyundai HB20X,2013 Hyundai HB20S,2013 Hyundai HB20,2012 Hyundai i40,2011 Hyundai ix35,2011 Hyundai ix20,2011 Hyundai i10,2011 Hyundai Verna,2011 Hyundai Sonata,2011 Hyundai Azera,2011 Hyundai Avante,2010 Hyundai Accent,2009 Hyundai ix55,2009 Hyundai i20,2009 Hyundai Sonata,2008 Hyundai i800,2008 Hyundai i30,2008 Hyundai i10,2007 Hyundai Veracruz,2007 Hyundai Elantra,2007 Hyundai Coupe,2006 Hyundai Getz,2005 Hyundai Tucson,2005 Hyundai Trajet,2005 Hyundai Terracan,2005 Hyundai Sonata,2005 Hyundai Santa Fe,2005 Hyundai Portico Concept,2005 Hyundai Matrix,2005 Hyundai HED 1 Concept,2005 Hyundai Grandeur,2005 Hyundai Getz,2005 Hyundai Coupe,2004 Hyundai HCD8 Concept,2004 Hyundai Elantra,2004 Hyundai E-Cubed Concept,2004 Hyundai Atos Prime,2004 Hyundai Accent,2003 Hyundai CCS Concept,2002 Hyundai HCD 7 Concept,2001 Hyundai HCD 6 Concept
Note:
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