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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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Powertrain Control Module (PCM)
The oxygen sensor on a Buick Rendezvous is located immediately before the converter on the driver's side. You will need either a special socket or a wrench to remove the sensor.
where is horn relay on 1995 buick roadmaster
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.
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.
In the exhaust pipe
two
Somewhere on the exhaust system. LOOK
Which solenoid? BOB