Oxygen SensorOxygen Sensor Location
The coolant sensor on a 1994 Buick Roadmaster is located just above the Harmonic Balance pully at about 2 oclock
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If the old oxygen sensor is no longer functioning properly and you replace it with a new one you will certainly save quite a bit of fuel.
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It is not an oil level sensor it is an oil pressure sensor. It just unscrews.
Powertrain Control Module (PCM)
On a 1992 Buick Roadmaster, the oxygen sensor is typically located in the exhaust system, specifically on the exhaust manifold or just before the catalytic converter. You may find it on the driver's side, near the engine block. To access it, you might need to raise the vehicle for better visibility and reach. Always ensure the engine is cool before attempting any inspection or removal.
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The 1990 Buick LeSabre oxygen sensor is located on the outside of the air cleaner housing. The oxygen sensor will be on the back side of the housing.
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