Question about 1999 Volkswagen Beetle

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P0422 I have a 1999 new beetle and I am getting dtc code P0422 which oxygen sensor das bank1 referring to one before the cat or after the cat and do i need to replace the cat converter also

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I have a 1999 VW golf GL 2.0 code p0322, p0422, and p0303 I need help.

Posted on Mar 23, 2010

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P0422 does not refer directly to an O2 sensor. That is a different code. P0422 is about the CAT. How many miles you have it and when did you buy it? VW has extended a warranty on the New Beetles for the CAT to 120,000 mi and 10 yrs. I had the same code and took it to the dealer to see if they'd replace the CAT in the warranty and they did. I had 47,000 miles and bought it at the end of Aug 1999, so I just slipped through. They replaced the downstream O2 sensor as well - all free of charge!

Posted on Aug 19, 2009

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After the cat. No you do not need to replace it.

Posted on Jan 27, 2009

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I have a 2008 Hyundai santa fe and I read a p0131 on a scan tool. where is the oxygen sensor bank1 sensor?

code p 0131 refers to heated oxygen (HO2S) sensor 1 bank 1 ---low voltage ===causes --exhaust leak--wiring short to ground ---HO2S sensor ---ECM
the HO2s) is the sensor in the exhaust manifold before the cat converter and bank 1 is closest to the fire wall
the exhaust leak could be in the mesh covered section of the exhaust pipe from the manifold to the cat converter as they crack and that will throw out the HO2s reading back to the ECM

Apr 16, 2017 | Hyundai Cars & Trucks

3 Answers

My 2000 2.0 JETTA is failing inspection and the code pulling up is P0422 but I was told the Cat is in good shape, any suggestions?

code p 0422 refers to main cat converter, bank 1 ---efficiency below thresh hold ===causes cat converter,--- wiring -- heated oxygen sensor (HO2S) 2
heated oxygen sensors are the ones in the exhaust manifolds before the cat converters
they are wired and the wires are delicate and can be easily damaged
O2 sensors (O2s) are found after the cat converters and can determine the quality of the cat performance
At this point I would be looking at the HO2S replacement as that is what the code indicates --IF-- the cat is in proper working condition

Nov 27, 2016 | Volkswagen Jetta Cars & Trucks

1 Answer

Have code P2238 - what could be the cause ?

code p 2238 has 3 references
heated oxygen sensor(HO2S) 1 bank 1,positive current control---circuit low ====causes ---wiring short to ground ---HO2S
second reference
oxygen sensor (O2S) 1 bank 1 positive current---circuit low====causes ---wiring short to ground ---O2S
3rd reference
HO2S 1 bank 1--implausible signal===causes ---wiring---short to positive ---short to ground ---HO2S---ECM
as the heated oxygen sensor is common with wiring problems indicated , maybe changing it will fix the code
HO2S is the sensor in the exhaust manifold in bank1 before the cat converter

Oct 13, 2016 | 2003 Toyota Tundra

3 Answers

1999 silverado,4.8,v8,1500,code PO137

Code 137.....whats the brand of tool you are using?? Go online and download the pdf ..manual for that tool and then you will know what the code means..

Apr 14, 2014 | 1999 Chevrolet Silverado 1500

2 Answers

2001tiburoncomputor codes, po136 & 141 what do they refer to.

P0136 = Oxygen Sensor Circuit Malfunction (Bank1, Sensor2)
P0141 = Oxygen Sensor Heater Circuit Malfunction (Bank1, Sensor2)


If 4 cylinder engine, there are only two O2 Sensors - Sensor 1 is on top, Sensor 2 is at the bottom

If 6 cylinder, there are four (4) O2 sensors (Bank1, Sensor2 is on the firewall side of this engine and is referred to as the 'DOWNSTREAM' sensor (the one AFTER the Catalytic Converter)

Aug 25, 2011 | Hyundai Tiburon Cars & Trucks

1 Answer

P1196 manufacture specific DTC

o2 sensor heater circuit malfuntion. bank1 sensor 1. this is the oxygen sensor before the cat.

Oct 31, 2009 | 2001 Volkswagen Beetle

1 Answer

Where is bank 2 for oxygen sensor

if it is a 6 cylinder it is in the front of the motor next to the radiator. bank2 sensor 1. back side of motor next to the fire wall is bank1 sensor 1. the one behind the cat is bank1 sensor 2. make sure that is the problem. if code p0420 is the cat or cat's are bad.

Aug 06, 2009 | 2001 Ford Escape

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.


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.


* 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

1 Answer

In a Saturn SL2 1998, I have the check engine soon light on. The codes readings show P0133 and P0422.

P0133 is an oxygen sensor "response too slow" code (meaning it's not getting up to temperature quickly enough, and the computer is assuming damage to its heating element). P0422 is a catalytic converter problem indication (cat is below peak efficiency). It's assuming you have a failure with the primary O2 sensor and that the cat is also bad. Change your O2 sensor first, have the codes cleared, and see if the cat code comes back or if the O2 sensor change fixes both issues.

Jul 29, 2008 | Saturn SL2 Cars & Trucks

2 Answers

I have two check engine lights on P0303 and P0422

A good start would be to go you the Diagnostic Trouble Codes list at

The DTC's, also known as fault codes, may have other meanings but the list above should point you in the right direction.

Hope this helps - if so a rating would be really appreciated. If is doesn't then "add a comment" instead and I will try to help you further.
Cheers D..

Jul 04, 2008 | 1999 Volkswagen Beetle

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