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PO401 trouble code - Cars & Trucks

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Trouble code po401


http://youtu.be/XgfT3kuY8lc here is a url to help you fix p0401 it is a video on you tube from scotty kilmer

May 23, 2013 | 2003 Hyundai Santa Fe

1 Answer

Using my OBD II on 2000 honda prelude trouble codes PO401 & (PO401 pd) all reads MIL on, monitors, 1 INC, EVAP, 7 ready, MISFIRE, FUEL, COMP, CATLYST, 02 sensor, 02 HTR, EGR. Will be cleaning out EGR, BUT...


I would start with whatever is causing the misfire. That seems to be the core of your emissions codes. Putting all codes together it seems to be clogged injectors vacuum leak. Seems to be causing stalling too.

Jun 09, 2017 | Honda Prelude Cars & Trucks

1 Answer

96 cutlass supreme will not pass emission in ut. what should I do? KOER failed, trouble code po401


cleanout egr valve and troutle body . Or replace egr with new one, clean, check vacumm lines , check for clogged check , depending on modle of car you can pippoint problem as some have a common part problem depeding with make of car. But all have to do with exaust system. Insufficient flow exaust flow. Im not an expert, all I know it is related to this, I have it myself so im googling it.

Ford EGR valve

The OBDII fault code P0401 means that the engine computer has detected that the Exhaust Gas Recirculation (EGR) system flow is insufficient. Read more how the EGR system works below. What could cause the code P0401 - clogged or restricted EGR passages
- faulty EGR valve
- EGR valve stuck closed
- problems with the DPFE sensor (Ford)
- problems with hoses to the DPFE sensor (Ford)
- problem with the EGR vacuum switching valve (Toyota)
- clogged catalytic converter
- carboned up EGR temperature sensor
- vacuum supply issues at the vacuum-operated EGR valve
- electrical problems with the EGR valve control circuit
- engine computer problems
helpful website helps you with pinpoint and sou;ution related to auto make and model shows you most common cause of code reading.
www.samarins.com

Apr 16, 2013 | Cars & Trucks

1 Answer

Need help trouble shooting 2 codes, P0401 & P0455


Google the codes

Lots to read & study

OBD2 PO401

OBD2 PO455

Think you will a repair shop to smoke the
Evap for the 455

Feb 14, 2013 | 2000 Mercury Mountaineer

1 Answer

Po401


Trouble Code: P0128

ECT Sensor Below Thermostat Regulating Temperature

Possible Causes:


Check the operation of the thermostat (it may be stuck open).Coolant level is too low, or the coolant mixture is incorrect.ECT sensor signal circuit has a high resistance condition.ECT sensor is damaged or it has failed.Trouble Code: P0401

Insufficient EGR Flow Detected

Possible Causes:


Base engine problem (e.g., a severely restricted exhaust).EGR vacuum hoses damaged, loose or routed incorrectly.EGR passages or intake passages clogged or restricted.EGR solenoid valve is clogged (carbon), damaged or has failed.TSB 87-65-22 contains a repair procedure for this code.

Dec 29, 2012 | 2005 Chevrolet Impala

1 Answer

My car is diagnosed of trouble code of PO401; meaning that insufficient Exhaust Gas Recirculation (EGR). Kindly advice me on what to do.


if you are handy find a video from ericthecarguy on YouTube. he will explain it better than I. Basically clean all passages in the EGR system.

Sep 25, 2012 | 1997 Toyota Camry

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I have a 1997 chevy lumina. i had 2 coded before, po420 and po401. i changed the egr valve, and now the po420 is gone. i just replaced the egr tube, cleared the codes, and now the po401 is back. car sounds...


Well, the po401 is saying is that the egr valve has restricted flow. After changing the egr and the tube, something else is causing the restriction. a more thorough diagnosis is recommended. The po420 code sounds like a possible catalyst failure or an o2 sensor failure.

Oct 16, 2010 | 1997 Chevrolet Lumina

1 Answer

I have a 97 chevy lumina ls car. i am getting the code po401. i have brainstormed around the egr area, but haven't solved it yet. what do you think the problem is?


Could be a dirty EGR pintle passage area.
This is a common problem where carbon builds up and causes a code to trip.

A DTC trouble code P0401 which is insufficient EGR (exhaust gas recirculation) flow.

Oct 09, 2010 | 1997 Chevrolet Lumina

3 Answers

Trouble codes PO174,PO401,PO420 NEED TO FIX SO I


P0174 means Fuel Trim too Lean (Bank 2)

P0401 means Exhaust Gas Recirculation Flow Insufficient Detected

P0420 means Catalyst System Efficiency Below Threshold (Bank 1)

Visit http://www.troublecodes.net/OBD2/

and Visit www.repairpal.com

Sep 28, 2009 | 1999 Ford Contour

1 Answer

IDLES ROUGH LOSS OF POWER BETWEEN 45-55 MPH RUNS REALLY ROUGH LIKE STARVING FOR FUEL TROUBLE CODES P0263 P0336 PO401 PB2B P2763


just a guess but might be a fuel pump, try smacking the tank before you start it and see if it idles better after.

Jul 25, 2008 | 2000 Ford Mustang

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