oil is leaking from the oxygen sensors located on the catelytic convertor on 2004 Suzuki Verona

oil is leaking from the oxygen sensors located on the catelytic convertor.and creating smoke under the hood.kindly let me know what to do ,either change the sensors.What is the function of the two sensors which are located on the catelytic convertor.

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2 answers
First and foremost, you need to stop the oil leaking, which may be coming from the valve cover gaskets.
The oxygen sensors measure the amount of oxygen in the exhaust and then tell that information to the engine computer which uses it to adjust the amount of fuel going in to the engine to precisely the correct amount needed at any given time.


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