Does the oxygen sensor go bad on a 2002 cadillac sts when the catalytic converters is bad?

Does the oxygen sensor go bad on a 2002 cadillac sts when the catalytic converters is bad Asked by 2002sts 6 days ago Similar questions: oxygen sensor 2002 cadillac sts catalytic converters Environment > Air Quality.

Similar questions: oxygen sensor 2002 cadillac sts catalytic converters.

Not necessarily, but if the cat goes bad, the sensor might have been a contributing factor, also sometimes the sensor is screwed into the cat and it's impossible to salvage the old one as they can get firmly rusted into place.

Cause my service engine soon light is on I scan it an has the codes p0420, p0420/o2 was wondering if I should change both their is no changes that have happen to my car it runs excellent still only thing less gas mileage 2002sts 6 days ago .

The car computer will detect a bad O2 sensor and log a fault code. Now quite often the problem isn't just in the O2 sensor, sometimes it gets contaminated by bad gas additives, or overheated by a too-rich mixture. So if your car computer logs an O2 problem, replacing the O2 sensor is the most appropriate thing to do.It's also possible to first CHECK the O2 sensor with a voltmeter, but the readings may be inconclusive if the engine is stuck on delivering a too lean or too rich mixture.

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