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If the catalytic convertor is truly plugged, you wouldn't be able to drive the vehicle, so this makes me wonder about the voracity of your statement. With a plugged cat, the back pressure created behind it will only let you rev the engine to around 1500-2000 rpm. I had to replace a set of heads on a pick-up truck for a guy because he continued to run the ...


With the P0422 code, it can either be the O2 or the cat which is bad. Do as @JuannStrauss said at first and see if you can clean the O2 sensor. You don't do this by taking it out, but rather running some cleaner through the engine. My preferred method for this is a SeaFoam treatment. If that doesn't fix your ills, you need to figure out if your cat is ...


Is it normal to attach a catalytic converter using u-bolts? Or when i replace it should I have it welded? It is not normal to utilize u-bolts (muffler clamps) on catalytic converters. They are most often welded in place.


Short answer, yes - a faulty O2 can make the Check Engine Light / MIL to go on. Do you know what the code is?


This is by far the best video I've seen which gives two ways to tell if your catalytic converter is bad. In a nutshell, Eric the Car Guy uses two methods to diagnose a bad converter: He uses a scan tool which uses live data to do just what you are looking at. He is checking to see how the downstream O2 sensor is behaving. Basically it should be fairly ...


Looking it up on RockAuto.com, it shows for the 2.0l SOHC engine (they do not list an option for a 2.0L DOHC in the Beetle), the catalytic convertor which is offered there is a direct fit for 2001-2005 Beetle and for the 2002-2006 Jetta (as well as the 2001-2005 Golf and some even have it for a Mercedes model ... argh). This would seem to me to mean the cat ...


If the Beetle is the 2l version, then they have the same engine, so you should be good to go. I don't know however if the section of pipe that the cat is in is compatible with the Jetta. These things are pretty cheap, relatively speaking. I would be surprised if they cost more than $100 to $150 (I don't know where in the world you are, but everyone knows how ...

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