Question about 1997 Cadillac DeVille
What affect will a sensor po138 have on the running of my engine?
Hey, The o2 sensor affects the fine tuning of the engine. it is used to tell how well the engine is burning off the fuel in the combustion process. if there is too much oxygen, then it will adjust the air/fuel mixture accordingly and vice versa. If the car runs too lean or to rich you will loose power and possibly damage your engine. It would be a good idea to replace if its faulty.
Posted on Dec 29, 2012
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Posted on Jan 02, 2017
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