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Catalytic Converters
Chevy S-10
Check Engine Light

Could a faulty O2 sensor make a 98 Chevy S10 43 liter engine light come on with a 420 code catalytic converter operating under threshold and if so where is it?


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Wiki User
2015-07-15 21:12:07
2015-07-15 21:12:07

no you need the catalytic converter replaced or removed but the o2 has a code of its own which it is P0141 and says the sensor is malfunctioning

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Catalyst efficiency below threshold, your catalytic converter may have failed.Catalyst efficiency below threshold, your catalytic converter may have failed.

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The catalytic converter is in the exhaust pipe directly behind the engine.The catalytic converter is in the exhaust pipe directly behind the engine.

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That depends on the engine and the fuel you've used. If the engine starts burning oil a catalytic converter can fail rapidly. Some fuel additives can also cause a catalytic converter to fail prematurely.

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If you're referring to removing the catalytic converter from your vehicle, first off this is illegal. Secondly no modern engine will run properly with the catalytic converter removed. You must have a fully functional catalytic converter in place.


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