Oxygen Sensor Replacement

courtesy of Bob, The Auto Answer Man

I just took my 1990 Buick LeSabre to the shop and the diagnostics performes there discovered that the oxigen sensor would need to be replaced sometime in the near future. I have never heard of this oxigen sensor before and my father-in-law, who knows quite a bit about cars, also had never heard about it before. The mechanic said it affects the car's gas mileage. Anyway, I decided to hold off doing anything about it until I could get more information. How quickly does this device deteriorate?? Should I be concerned?
Mariano in Hoffman Estates, IL

Sorry to say, but if your father in law does not know what an oxygen sensor is, then he really doesnt know anything about modern cars... You see, this sensor is the key element in how your car will run... It senses how the engine is performing and tells the computer, which in turns modifies how the engine is controlled. If you continue to run with bad oxygen sensors (EGO) then the catalytic converters will be damaged and they are expensive to replace.
Good Luck!
Drive Safely!
Bob, The Auto Answer Man

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