You bet, probably two.
No, it is illegal to remove a converter and besides the engine will not run correctly with the converter removed.
The O2 sensor is in the exhaust pipe before the catalytic converter.
check the catalytic converter. if the engine isisnt running hotter than normal it is most likely plugged exhaust somewhere likely in the catalytic converter
The rear oxygen sensors are located after the catalytic converter's Usually under the vehicles floorboard.
Air/Fuel mixture too rich, cylinder misfire, or external damage to the converter.
I had a similar problem with a 1987 Cavalier, it turned out to be a bad catalytic converter.
well first you have to check and make sure your canooter valve ain't clogged, then u took the old one out and put the new one in....
The best way to improve fuel economy it make sure your tire are inflated to the factory specification (there should be a tire information placard on one of the doors). Beyond that, making the engine breath better will also have marginal benefits. You can try installing a less restrictive air intake system, and an exhaust system with wider pipes. If you live in a state or country that does not do emissions testing, then you can remove the catalytic converter(s), which are a huge restriction. If your car has to go through emissions testing, then there are hi-flow converters that may work. The above answer is correct except the part about removing the catalytic converter. First of all removing the catalytic converter is illegal. Secondly modern engines equipped with fuel management systems will not run properly with the catalytic converter removed. Do not, remove your catalytic converter.
Mercedes,bmw,acura
There are four sensors, under car. 740i/iL has dual exhaust, 2 sensors per side, one in front of each catalytic converter and one behind. Sensors rarely go bad. Catalytic converters are sensitive to today's pourly refined gasoline and can burn out prematurely.
I found a catalytic converter for a 1.9L for $332 shipped on eBay. I think it was listed around $360 and I asked for a lower price. It was a direct-fit, bolt-on kind. The gasket it came with was wrong, so I re-used the original... I had to buy jack stands and some hex wrenches, but was able to do the work myself at almost no cost (a couple hours time when you do it the first time).