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Looks like part of the muffler to me. You should have it replaced it could end up obstructing the exhaust.


I found pretty good video about changing the muffler here. As Larry said, it is not the catalysator but the part before the catalysator. It looks like something that even an amateur is able to do. In Finland, the cost is about 60EUR for the part so not expensive part. (source of the image) Terminology muffler = äänenvaimentimet, takapönttö ...


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, ...


The tailpipe and silencer assembly is what you have pictured. The tailpipe and silencer is at the end of your exhaust system. Because of its position in the system it gets hotter and colder more often, and corrodes more quickly then any other part of the exhaust. Exhausts tend to rust from the inside to the outside first. This is what has happened, and it ...


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


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 ...


I got the same code with 2000 tundra. I found you need to compare HO₂S Sensor 2 to engine load. If engine load is low enough, the sensor voltage should be 0 for a period of time as well. When decelerating, engine load is low, rpm is low and throttle position probably is close. Not a technician, just leaning.

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