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

Failed emission... do I need to replace catalyic converter to solve this problem

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  • 49 Answers

P1443 is Purge control solenoid , p0420 is catalytic converter and Egr vale for code p0401

Posted on Mar 28, 2014

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Posted on Jan 02, 2017

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Murphybanton
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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

ZJLimited
  • 17970 Answers

SOURCE: p1443 auxiliary emission control, 1997 mustang gt

DTC P1443 EVAP Purge Control Solenoid '2' Circuit Fault

Check the evap line and components for damage. Has a tune up ever been done?

Good luck.

Posted on Jul 14, 2010

golem31
  • 104 Answers

SOURCE: i have a 1997 chevy lumina. i had 2 coded before,

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.

Posted on Oct 16, 2010

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Can catalytic converter cause a PO65O code


Pesky PO420 Codes - Eastern Catalytic

www.easterncatalytic.com/education/tech-tips/pesky-p0420-codes/
One of the most annoying is the persistent PO420 diagnostic code (Catalyst System ... not only shows its teeth when the catalytic converter is on the blink, but can also be ... Most, if not all, catalytic converter failures are caused by a problem or ...

P0420 Error Code: Catalyst System Efficiency Below ...

www.obd-codes.com/p0420
Repair information for the OBD-II trouble code P0420 - Catalyst System Efficiency ... If they have failed, it is likely due to something else that caused it to fail. ... the catalytic converter is broken or failed, it may be restricting the exhaust which will ...

explaining trouble codes po420 - po421 - Discount Catalytic ...


Jan 16, 2016 | Cars & Trucks

1 Answer

What does OBD catalyst do


Checks for Exhaust Converter Efficiency

If you have a PO420 or PO430 the converter is
Below the Federal Emission Standards & has to be
replaced,as you won't have much in the way of fuel control

Aug 16, 2014 | Cars & Trucks

1 Answer

P1443,p0401 and po420 failed emission


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

Mar 28, 2014 | Cars & Trucks

2 Answers

Check engine lite came on code is p1443 what does this code mean


P1443 Evaporative Emission Control System Control Valve The Evaporative Emission Control System monitors the fuel vapor flow between the engine intake manifold and the EVAP canister. The system failure occurs when a leak or blockage between the intake manifold, the EVAP canister purge valve and the EVAP canister is detected by the PCM.

Code P1443 Possible Causes:

- Pinched, blocked or plugged fuel vapor tubes/hoses (except between fuel tank and EVAP canister)

- Damaged EVAP canister

- Disconnected, cracked or cut fuel vapor tubes/hoses (except between fuel tank and EVAP canister)

- Damaged EVAP canister purge valve

May 04, 2011 | 1997 Ford Escort

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

3 Answers

Code p0420


Repair information for the OBD-II trouble code P0420 - Catalyst System Efficiency Below Threshold (Bank 1) Probably needs a catalytic converter

Apr 06, 2010 | 1999 Ford Contour

5 Answers

Po420 haunting me 03 jetta 1.8t


You're going to have to have the codes read and find out what is setting that light on. After that problem is repaired, the car must indeed complete a drive cycle, not nessacarily 200 miles. This lets the computer run all it's tests and set all its readiness monitors. If you know what the code number is now, post it and I'll tell you the most likely cause, and repair.

Feb 04, 2010 | 1998 Volkswagen Jetta

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

1 Answer

What is PO420 code


it sounds like the catalytic at bank one where the number one cylinder is might be bad but it could be the 02 sensor also
have the catalitic test or removed from a mufler shop and have them inspect it iside for damage
if it is bad then replace it,
you can also top on it if you hear like little rocks inside that means is not good and must to be repalced

May 28, 2008 | 1997 Chevrolet Astro

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