code 0422

99.5 jetta 2.0

I have a obdII reader
I read P0422
Main Catalyst,Bank1 Below Threshold

Can any one tell me what that is?

Thank You

It is either the o2 sensors on the catalytic converter or the catalytic converter itself is bad

I'm getting the same thing.
If it was a bad O2 sensor would it detect this?

The O2 sensors are ridiculously priced for this car.
So I didn't want to change them just to see if it was the catalytic but then thats not a cheap fix either.

I was looking at these has anyone used this babies.. generic O2 sensors.

http://www.autopartswarehouse.com/sku/Volkswagen/Jetta/Replacement/Oxygen_Sensor/2000/GLS/4_Cyl_2-dot-0L/USOS-4000.html?loc=Before+Catalytic+Converter&tlc=Engine+%26+Drivetrain#reviews

I'm also looking at a way to test them. .I don't have leads that will connect properly to the pins.. I'm having a hard time getting getting to the pins they are close together and my regular jump connectors are just to big to fit in the connector housing.

I was looking around on the internet and found a o2 bench test for this and I was contemplating taking them out and using this method to test.

http://www.youtube.com/watch?v=vdn4Dk5PSwc

will this really work?

Is there a better web place I should be going to ask VW questions like this?

It's the sensors. Get OEM brand for ultimate satisfaction. Here is a link to your problem. You could also try vwvortex.com for more issue solutions like yours. Good luck!
http://wiki.ross-tech.com/wiki/index.php/Special:Search?search=P0422&fulltext=Go
Franco

Thanks

I found a supplier in Canada that I can get OEM replacements or the aftermarket version I guess for about $100 cheaper than I can get them at the part source or any retail location Ive found around here.

Im going to pull them this weekend to at least try the bench test that I linked above.. and see how that goes

Ill check out that site as well thanks.