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Check engine light code p0401 - 2007 Mazda CX-7 Grand Touring

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EGR flow insufficient - Breather filter may be clogged - or bad solenoid.

Thanks!

Posted on Feb 24, 2012

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Check engine light is on, code is P0401,


google comes up with this answer:
https://repairpal.com/OBD-II-Code-P0401-Ford

Oct 04, 2014 | Ford Escape Cars & Trucks

1 Answer

What are codes p0401 and p0300 mean on a 2000 isuzu trooper


P0401 is EGR problem
P0300 is a cylinder 3 misfire.
Replace EGR valve and do a full tune-up.

Mar 19, 2014 | 2000 Isuzu Trooper

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

2 Answers

Hi there i have 1997 Avalon V6 . the check engine light up # 138 and 401 so can you tell me the name of that two please thnks


Trouble codes are normaly 4 digits with a "P" or "B" before it. I am gonna assume that you meant P0138 and P0401:
P0138 is Oxygen Sensor Circuit High Voltage (Bank 1, Sensor 2)
P0401 is Exhaust Gas Recirculation Flow Insufficient Detected

A code P0138 may mean that one or more of the following has happened:
  • Faulty O2 sensor
  • Short to battery voltage in O2 sensor signal circuit
  • High fuel pressure (not as likely)
Possible Solutions Here are some potential solutions:
  • Replace O2 sensor
  • Repair short to battery voltage in o2 sensor signal circuit
for info on the P0401:
http://www.obd-codes.com/p0401

Jul 10, 2011 | 1997 Toyota Avalon

1 Answer

Check engine light came on 1996 acura slx code reads p0401


Code P0401 indicates insufficient EGR flow. It's quite common on this model. The solution involves removing the upper intake manifold and cleaning the EGR passage.

Apr 16, 2011 | Acura SLX Cars & Trucks

1 Answer

P0401 check engine light code. What will fix it?


need to replace exhauust gas recirculation (EGR) valve....code p0401 reads EGR insufficient flow detected .............(so it is probably not opening properly.hope this helps you....thanks for using fixya.

Mar 13, 2011 | 2004 Hyundai Santa Fe

1 Answer

Check engin light code po401 what does this mean.


P0401= Exhaust Gas Recirculation "A" Flow Insufficient Detected
for more info pls refer to this link http://www.obd-codes.com/p0401
this isn't really nothing major to worry about it just a emission code

Feb 27, 2011 | 1998 Toyota Camry

1 Answer

95 Blazer code P0401


Have a little read of this link, it may help you.

http://www.obd-codes.com/p0401

Jun 19, 2009 | 1995 Chevrolet Blazer

1 Answer

P0401. P0133, P1131- emmision test


Based on what the tech manuals say I would change the DPFE sensor for the EGR Valve, careful not to tear the special silicone rubber hoses that go to it from the exhaust, as a Ford dealer tech I saw these codes allot, and the DPFE sensor was almost always the issue or the hoses going to it.

Oct 16, 2008 | 1996 Ford Taurus

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