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According to this website, the cat can surely be plugged by coolant entering the catalytic converter. Here are the reasons given on the website: Engine Tune-Up Required. A number of problems could occur to the catalytic converter as the result of an engine that is out of tune. Any time an engine is operating outside proper specifications, ...


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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.


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


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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 ...


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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 ...


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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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Looking at the description of the California O2 sensor for your car, the only thing different on it (besides the internals) is the electrical plug. The wrench which you tighten it down with is 7/8", which means the sensor bung should be the same size as well. I don't think there is any real external difference between the California and non-California ...



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