In most cases, NO. There are exceptions to the rule on Asian cars. Nissans really hate fuel injection cleaners. But on American cars, if you use a bottle of fuel injection cleaner, and your O2 sensor goes bad, its not because of the FI cleaner. Its because the sensor has gone bad, or something else is wrong with the car. If your O2 sensor is bad, I recomend doing a tune up, plugs, wires, PCV valve, air filter, oil change, and the O2 sensor.
The oxygen sensors control the amount fuel in the engine and if it is making too many emissions the oxygen sensors will cut back on the fuel or if they are worn out they will increase the amount of fuel. The catalytic converter will eventually get plugged up if the Oxygen sensors are bad. The oxygen sensors control the converter.
There are several 02 sensors in that vehicle depending on which engine you have. They are all threaded into the exhaust system at various points.
It shouldn't, but if your injectors were dirty, then the O2 sensors probably are too.
Upstream oxygen sensors send a signal to the PCM which adjusts the fuel mixture ( air / fuel ratio )
If the fuel is running too rich in a car, it would be a good idea to adjust the EFI or Electronic Fuel Injector (carburetor). It would also be a good idea to make sure that all of the air cleaners and oxygen sensors are clean and functioning properly.
air fuel ratio sensors are in the exhaust-they are like oxygen sensors but work differently
There are a total of ( 4 oxygen sensors ) according to the engine wiring schematic for the 1997 Mercury Mountaineer in my Haynes repair manual ( 2 oxygen sensors are " upstream " sensors used by the PCM to adjust the air / fuel ratio of the engine ) ( 2 oxygen sensors are " downstream " sensors / catalyst monitors )
The fuel additive container should say "O2 sensor safe".
There are 3 oxygen sensors on this vehicle. Some of the Highlanders with California emissions have 2 fron Air/Fuel Ratio sensors and one rear Oxygen sensor.
Oxygen sensors are located in teh exhaust stream, they do not directly measure the air or the fuel entering the engine. But when information from the oxygen sensor is coupled with other information from oher sources, it can be used to indirectly determine the air-to-fuel ratio. In addition, to enabling electronic fuel injection to work efficiently, this emission control technique can reduce the amounts of both unburnt fuel and oxides of nitrogen from entering the atmosphere.
Black smoke means the engine consumes too much gas - possible problem with fuel injection. Is your check engine light on? It could also be a problem with oxygen sensors.
two oxygen sensors for air / fuel ratio (and another two oxygen sensors that are called catalyst monitors installed downstream )