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P1443,p0401 and po420 failed emission

Failed emission with p1443,po401 and po420. do I need to replace catalyic converter or how do I repair the problem... trying to sell work van.

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P1443 is an EVAP code which means the purge control solenoid.P0401 is an EGR valve and code p0420 is a catalytic converter.

Posted on Mar 28, 2014

  • dcastlebe820 Mar 28, 2014

    thank you Dana for your response. I understand what the codes are. Where should I start the process of elimination. I have read that doing one thing first will correct the problem of one or two of the codes. Where would you start first?

  • dcastlebe820 Mar 28, 2014

    Oh yeah, I read PO420 that if you put lacquer thinner in the 1/2 filled gas tank it will burn and make the engine run cleaner... Is this true? or is this a crazy attempt...

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Posted on Jan 02, 2017

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Murphybanton
  • 2004 Answers

SOURCE: 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

Posted on Sep 28, 2009

johnjohn2
  • 5763 Answers

SOURCE: codes are Po442,PO420,PO131 and PO401.I beleive

okay po442 isevap leak check gas cap amd right front tower in engine check evap line for broken hose,po131 bad o2 sensor top sensor on rear exhaust manifold,po420 is bad catalyic converter but could be o2 sensor.i would replace o2 first reset eng lingt and go from there, hope this helps good luck.

Posted on Oct 07, 2009

  • 1 Answer

SOURCE: 96 ford escort lx failed emissions code #p1443

1996 ford escort runs fine with full power but check engine light comes on p1443 and i changed gas cap the light still comes on?

Posted on Jan 09, 2010

  • 97 Answers

SOURCE: 2004 Mercury Monterey 70k CEL code PO401

po401 egr flow insufficient vaulve could be stuck or disconected

Posted on Mar 02, 2010

MRUTYU
  • 247 Answers

SOURCE: My Ford Taurus just failed a vehicle emission test

plz check the fuel and carborater first then go for silencer (if your car runned above 15000 kms got repair shop) even u can neglet, coz thees error come during winter sesion [they are related to carben and moister]

Posted on Jun 23, 2010

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Related Questions:

1 Answer

P1443,po420 and po401 -failed emission... how to repair


p1443 is Purge control solenoid , p0420 is catalytic converter and Egr vale for code p0401

Mar 28, 2014 | 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

P0401 code


Do you not look up the codes & diagnose them?

Google PO401

Jan 06, 2013 | Mitsubishi Cars & Trucks

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

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

2 Answers

Diagnostic trouble code po401


The p0401 indicates a lack of egr flow. The DPFE sensor (ford basic part number 9J460) is the most common cause of this code. Call a ford dealer for a price and ask if your vehicle is covered under any emissions recall or program for p0401.

Apr 15, 2010 | 2002 Ford Escape

1 Answer

Codes are Po442,PO420,PO131 and PO401.I beleive these all have to do with exhaust emission or leaks


okay po442 isevap leak check gas cap amd right front tower in engine check evap line for broken hose,po131 bad o2 sensor top sensor on rear exhaust manifold,po420 is bad catalyic converter but could be o2 sensor.i would replace o2 first reset eng lingt and go from there, hope this helps good luck.

Oct 07, 2009 | 2003 Dodge Caravan

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

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