Question about 1996 Oldsmobile LSS

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Catalytic converter is purple colored and check engine light is throwin a code for converter. Wondering if gas is gettin dump in converter turning it purple. I f that's the case what cause gas to leak in converter?

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The cat converter is f....d if its purple cos it got too hot, the inside melted......replace asap.too rich a mixture will hurt it but the o2 sensor will go first.poss its just worn out.....

Posted on Aug 24, 2010

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Posted on Jan 02, 2017

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P0422 Buick - 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



Thanks for using FixYa - a 4 THUMBS rating is appreciated for answering your FREE question.

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Check engine light - catalytic converter problem


If you haven't replaced the O2 sensor that is causing your check engine light to come on by generating a fault code in the ECM, replace it first. Cleaning the Catalytic Converter is not the thing to do. Replacing the faulty sensor will pay for itself in the long run with the better fuel economy you will get.

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1 Answer

1996 VW Jetta has an engine code of P1586 Engine


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



Thanks for using FixYa - a 4 THUMBS rating is appreciated for answering your FREE question.#$%^&

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Cat efficentcy. replace the converter.

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My catalytic converter gets red hot after 5 min of driving


yes this could be the fault but you would have a light on the dash in the shape of an engine this is the eml light>engine managment light)this is the computer he is talking about unfortunatley yes it could be costlyit has a lot of miles on it hope this helps you

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