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P0401 code gas recirculation insufficient flow detected how can i take care of that

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Replace the DPFE sensor. Differential Pressure Feedback EGR sensor. What size engine?

Posted on Jul 30, 2010

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What do OBDII Codes P0401 and P0404 indicate in a 2001 Chevy Impala?


P0401 usually means for most vehicles
Exhaust Gas Recirculation Flow Insufficient Detected

P0404 usually means for most vehicles
Exhaust Gas Recirculation Circuit Range/Performance


Feb 18, 2015 | Cars & Trucks

1 Answer

What do the OBDII trouble codes P0401 & P0404 mean with 2001 Chevy Impala?


P0401 Exhaust Gas Recirculation Flow Insufficient Detected

P0404 Exhaust Gas Recirculation Circuit Range/Performance

Feb 18, 2015 | Cars & Trucks

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Trouble code P0401


code p0401 refers to exhaust gas recirculation(EGR) system-insufficient flow detected--- Causes ---hose leak/blockage, basic setting not carried out( if applicable)wiring--EGR valve/solenoid---ECM I would check the EGR valve solenoid first. Replace the faulty units with genuine one because most aftermarket units are not set for OEM cpu units and are not completely
compatible.

May 11, 2013 | 1997 GMC Sonoma

1 Answer

Trouble code P0401


P0401 Exhaust Gas Recirculation Flow Insufficient Detected
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Apr 24, 2013 | 2000 Honda Accord

2 Answers

Check engine light code P0401 98 Ford expedition


OBD-II Trouble Code P0401 - Insufficient EGR Flow

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 code means that OBD detected an insufficient amount of EGR. 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.

A code P0401 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

Check it and keep us updated. Hope this helps (remember to rating this free answer).

Oct 13, 2011 | 1998 Ford Expedition

1 Answer

I have 4 codes: 1- p0401 2- p0401 Pd 3- p0403 4- p0405 what do I have to do to get rid of these codes. what are these and where are they located on a 2004 grand am Thx


p0401
Exhaust gas recirculation-insufficient flow detected
p0403
Exhaust gas recirculation-circuit malfunction
p0405
Exhaust gas recirculation vave position sensor A- circuit low

hope this helps. not sure where they are located

Aug 27, 2010 | 2004 Pontiac Grand Am

1 Answer

What's wrong with the code P0401 for camry 96


P0401 OBD-II Trouble Code
Insufficient EGR Flow
What does that mean?
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 (DPF). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0401 code means that OBD detected an insufficient amount of EGR.

May 06, 2010 | 1996 Toyota Camry

2 Answers

Obd codes p0300 p0301 p0303 p0305 p0401


P0401 Exhaust Gas Recirculation Insufficient Flow Detected

P0300 Random/Multiple Cylinder Misfire Detected
P0301 Cylinder 1 Misfire Detected
P0303 Cylinder 3 Misfire Detected
P0305 Cylinder 5 Misfire Detected


I would check out the EGR valve. That maybe what is causing all the misfires.

Mar 24, 2009 | 1997 Toyota Camry

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