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Can your car run without an o2 sensor?

Updated: 10/23/2022
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15y ago

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Yes it can run but not very well. The oxygen sensor reports live information about the engine's air/fuel mixture to the powertrain control module. This information is used primarily to help calculate fuel delivery to the engine, which changes continuously while it is running. If the engine is running lean, the powertrain control module will sense this from the oxygen sensor's signal and increase the air/fuel mixture to the engine. Conversely, just the opposite occurs when the engine begins to run rich. On OBDII-equipped vehicles, the sensors are also used to help determine the efficiency of the catalytic converter. The powertrain control module does this by comparing the signal of the sensor located at the inlet of the catalytic converter with the signal of the sensor located at the outlet of the converter. Remove the O2 sensor and you can experience poor gas mileage, a failed emissions test, "rotten-eggs" smell from the exhaust, poor acceleration and more. Install a new O2 sensor.

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Q: Can your car run without an o2 sensor?
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What happens when an o2 sensor goes bad?

When an O2 sensor is bad your car will not run efficiently. You will use more gas than you would normally use on a trip.


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You have a 91 Chevy lumina as it has on the manifold something that look like a spark plug but it is not as what is this and what does it do when the car is running or driving it?

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Can a 1996 Ford Taurus run without a catalytic converter where is the o2 sensor at?

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