On a gas engine you don't. The check engine light will come on if you tamper with the converter, you will not be able to turn it off. The engine will also suffer from lower fuel economy and performance. I agree, with the above post. It is also illegal to do this. Why would you want to do this in the first place unless your converter was clogged, which is highly unlikely on a 2002 vehicle? Leave it alone, there is no positives in removing it and plenty of negatives. On a diesel just buy a complete aftermarket straight pipe system.
Yes it can.
On any vehicle after 1996, YES.
If the car is buit after 1996 you will need to install a new catalytic converter to get check engine light to go out if the code is for the cat.
With out knowing what code is stored in the computer, that cannot be answered.
The catalytic converter is usually held in place by a set of clamps located at the front and rear of the unit. These clamps tie the unit to the exhaust system. If your converter is welded to the exhaust pipes, you will need to remove the old welding and weld the new one in place, or bring it to a service station and have them do it.
Don't know what year, make or model you have but if you continue to drive that vehicle with the service engine flashing it may do serious damage to the catalytic converter(s).
If it is not speced correct for it then, yes.
The use of catalytic converters as pollution control devices has been mandated on automobiles for decades. They are designed to last the life of the vehicle, and their failure is often indicative of other problems such as oil and gasoline contamination.
If the light is not flashing you can drive it until you can have it repaired. If the check engine light is flashing, park it. Otherwise you will do catastrophic damage to the catalytic converter costing several hundreds of dollars to replace.
Generally, unburned fuel getting into the converter is what damages them. How is it running?, what size engine? What did the dealer say is "wrong" with the converters they are replacing? -->You can easily damage your catalytic converter by making a lot of very short trips and not allowing you car to properly reach operating temperature.
Wrong scanner?? If a check engine light is on, there are codes. Timing sensor? Check engine usually means a problem... Service means that scheduled service needs to be performed like oil change, or timing belt replacement. I would Check your Catalytic Converter. What often happens is the catalyst that is in the Catalytic converter Heats up and Blows out into your Muffler. This means It is not the sensor,but your converter and Muffler Need Replaced.I have just fixed two cars with this problem,and they had the same symptoms,Check engine Light.
Sounds like its gone into service mode. Either a Lambda sensor failure or a failed catalytic converter.