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Diagnosis scan code p0401 what does this indicate

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P0401 = EGR System - Insufficient flow

Mike

Posted on Jul 15, 2008

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2 Answers

What could be the probable cause(s) of a persistent DTC P0401?


Did you do a reset on it? Easy way to reset is disconnect the battery. It will reset the "brain" to show no codes.

May 29, 2015 | Cars & Trucks

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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

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Why does my 2002 Acura Rl have a error code of P0401


P0420-catatytic convertor failure Replace convertor
P0401- EGR flow insufficient-Clean EGR passages
P0730-Faulty transmission shift control-Get diagnosed

Jun 01, 2014 | 2002 Acura RL 3.5

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I have a Ford Freestar 2005 with this diagnosis: P0401 EGR. I want to know if this is the cause that the minivan won't move on DRIVE or REVERSE or any other . Like it stays in NEUTRO.


P0401 is insufficent flow to the EGR,and has nothing to do with your trans trouble-check to see if the fluid it up to where it should be on your trans dipstick. If it is, the only other thing that might be happening (without costing a small fortune for a new/rebuilt trans) is the cable from the shifter to the position sensor (or the sensor itself) is bad, misaligned or broken. Otherwise, you are looking at internal trans issues.

Sep 01, 2011 | 2005 Ford Freestar

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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

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My 2003 chevy impal idles very high an i found 3 codes that are p0113,p0401,p1639,can anyone help me understand whats going on


p1639 is low a/c refrig. so that's not it. p0113 is low intake air temp. which is telling the computer its -38 f. This can cause the idle to be raised. and p0401 is EGR flow test failed.
Can you post what motor this has 3.8 liter or the 3.4 liter. This is something that we need to know.

Feb 14, 2011 | Chevrolet Impala Cars & Trucks

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 code


P0401 indicates that EGR Flow Insufficient.

But if you have handled it and believe it is okay, I will give you tips on turning the warning off.

  • All trouble codes must be purged from the ECUs memory after repairing the faults. Otherwise, code(s) would remain in the ECUs memory indefinitely and would appear along with a new code in the event of a future problem.
  • Remove the EFI fuse (15A) for 30 seconds with the ignition switch OFF to clear any codes. It may take longer than 30 seconds, depending on ambient temperature (the lower the temperature, the longer the fuse must be left out).
  • Trouble codes can also be cleared by disconnecting the vehicle battery. However, other memory functions (clock, radio, etc.), will need to be reset.
  • After the codes are cleared, road test the vehicle (as applicable for the fault) and recheck if any codes reset. If so, it indicates that the trouble area has not been repaired correctly.
Or remove the battery terminal head for 10 minutes.

May 27, 2009 | 1996 Toyota Tercel

1 Answer

Multiple vacuum problems. Now receiving P0401 and P0308 codes.


spray carb. cleaner on vac lines while running. engine will change rpm when sprayed near vac leak

Jan 10, 2009 | 1998 Ford Expedition

1 Answer

Diagnosis code


P0401 = EGR System - Insufficient flow


Echoing, hope this helps,

Mike

Jul 14, 2008 | Saturn SL1 Cars & Trucks

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