Question about 2003 Volkswagen Beetle TDI

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2003 VW beetle failed emissions, Gives code 420.. do I need to replace the o2 sensor or the catalytic converter.

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: vw jetta 2003

Take your car to autozone or another parts store that will be willing to pull the OBD II diagnostic codes for free or buy an inexpensive $40-50 OBD II diagnostic reader.  

I have a 05 Jetta TDI 100K miles and a 99 Passat AEB wagon 140K miles, and I don't think there is a specific Catalytic converter instrument light, just a generic check engine light to inform you to pull the OBD II codes (there are hundreds of codes your Jetta can throw ... but not hundreds of lights on the dash;~) ).  If you don't overfill the car with oil, or drive like a maniac, the VW cats should last for 200-300K or better.  Of course I only wore out 40% of the original front brake pads in 100K miles in the Jetta too.  I know how to work on cars ... but prefer not to have to ... so I drive easy;~).

FYI - IF the cat is plugged up, your car will not have any power.  If you pass emission test and have poweer ... forget about the cat,  just read the codes

cheers
..ajm

Posted on Oct 29, 2008

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  • 4 Answers

SOURCE: 98 VW Beetle 2.0L, Check engine light with OBD Code PO118

BTW - if you have less than 100,000miles you might be able to have your cat replaced under warranty by the dealer. In Canada it's 160,000km.

Posted on Mar 16, 2009

youngenginee
  • 57 Answers

SOURCE: High Emissions

sorry if that is the code it is not correct with the obd format it surpose to have something like P0033 re-check and let us know the correct code

Posted on Aug 01, 2009

  • 1114 Answers

SOURCE: 2003 VW golf o2 sensor?

Yes, it could be something else, other than the converter, such as a faulty o2 sensor. Take your VW to Autozone or Advance auto, and ask them to a do a scan, to see what they come up with ( think it's free).

Posted on Aug 18, 2009

  • 447 Answers

SOURCE: Coils need to be replaced and VW Touareg Catalytic Converter

Call around find out. Call at least 3 repair shops to get an estimate.

Posted on Mar 31, 2010

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1 Answer

How do I troubleshoot code P0420 and pass emissions


code p 420 refers to catalytic converter system bank 1--efficiency below threshold ===causes--- catalytic converter,--wiring---HO2S 2 sensor
could be a bad HO2S sensor or a failed cat converter
try the sensor first as they are cheaper than a cat

Nov 13, 2015 | 1997 Ford Explorer AWD

1 Answer

Emissioncodepo455howtofix


Could be the O2 sensor or the catalytic converter plugged. O2 sensors can be sandblasted and replaced. Catalytic convertors can be taken off, punched out with a hammer and prybar; and then replaced. How does it run when cold? Does your state have emissions codes. May want to replact the catalytic converter.

Jan 25, 2013 | 2003 Chevrolet Silverado 1500

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05' Dodge RAM 1500 code p0420. I've been changing oxygen sensors since u bought it 2 years ago, thought the problem was solved but yet again check engine light came on, could there be an other problem??


Hello: Code P0 420 indicates the catalytic converter is operating below calibrated efficiency (below 60%) replacing the oxygen sensors will not correct the condition. The converter needs to be replaced and the code cleared.

Apr 04, 2011 | 2005 Dodge Ram 1500

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The catalytic misfire warning light came on in my VW beetle. What does that mean?


There is a recall on the catalytic converter. Call your dealer for free replacement. just did mine!

May 29, 2010 | 2003 Volkswagen Beetle TDI

1 Answer

1998 Volkwagen Beetle Emissions Trouble Codes


Need to know the codes before we can do anything else.
I'll have to get back to you on the voltage at O2 sensors but they could be ok. Cat's perfect output gotta be 100 degrees lower than input. Get codes and I'll help you out.
Try our manuals section to get spec's.

Mar 07, 2010 | 1998 Volkswagen Beetle

3 Answers

Check Engine Light was came up with code po430.


its going to be either an o2 sensor(bank 2) or a catalytic converter

Jan 13, 2010 | 1997 Ford Thunderbird LX

2 Answers

Trouble code


DTC P0420 Catalyst System Low Efficiency Bank 1

You will find a bad O2 Sensor behind the converter or a bad catalytic converter on the bank 1 side of the exhaust manifold. This is the one on the drivers side.

Jul 28, 2009 | 1999 GMC Sierra

1 Answer

High Emissions


sorry if that is the code it is not correct with the obd format it surpose to have something like P0033 re-check and let us know the correct code

Jun 15, 2009 | 2001 Volkswagen Beetle

1 Answer

DTC #420 on a 2004 chevy Cavalier


Need to monitor rear HO2 sensor operation. Possible bad rear O2 sensor or failed catalytic converter

Mar 29, 2009 | 2004 Chevrolet Cavalier

1 Answer

1999 beetle P0422 which O2 is bad the o2 before the cat or after


P0422 - Catalyst below threshold.

Catalytic converter is clogged or out of medium.

Replace it.


ACTUAL DIAGNOSTIC:

Fault Code Definition
Code P0422 indicates that the Bank 1 Main Catalytic Converter's emissions efficiency has fallen below the minimum allowable limit. This threshold is tracked by a Catalyst Monitoring Oxygen Sensor located on or near the outlet of the Catalytic Converter.

Symptoms

* Check Engine Light will illuminate
* In many cases, no abnormal symptoms may be noticed

Common Problems That Trigger the P0422 Code

* Defective Catalytic Converter
* Engine misfires have damaged the Catalytic Converter
* Internal engine damage resulting in high oil consumption and/or a leaking Head gasket has damaged the Catalytic Converter

Common Misdiagnoses

* Oxygen Sensors are replaced when the real problem is a damaged Catalyst
* Catalyst is replaced when the real problem is internal engine damage, which is producing elevated emissions levels
* Catalyst is replaced when a misfiring engine is the real problem



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Jan 27, 2009 | 1999 Volkswagen Beetle

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