Wednesday, October 2, 2013

How to Install the 1997 Volvo 850 Oxygen Sensor

How to Install the 1997 Volvo 850 Oxygen Sensor

The 1997 Volvo 850 is equipped with two oxygen sensors along the exhaust system. The sensors thread into the exhaust pipes in front of and behind the catalytic converter. The sensors monitor the amount of oxygen in the exhaust to notify the cars fuel system to adjust the amount of fuel burned by the engine. When a sensor fails, the "Check Engine" light will illuminate and your fuel mileage will substantially decrease. Buy new sensors from an auto parts retailer and change them at home for a cost-effective repair.

Instructions

    1

    Open the hood of your 850. Loosen the negative battery cable with a wrench and lift it off the terminal.

    2

    Raise the car with a jack and stabilize it on jack stands. Locate the oxygen sensors on either side of the catalytic converter.

    3

    Disconnect the electrical wiring harness on the sensor by pressing the retaining tab and pulling the connector apart.

    4

    Remove the sensor with a wrench or ratchet and oxygen sensor socket. Spread anti-seize compound on the threads of the new sensor. Install the new sensor by hand.

    5

    Tighten the sensor using a wrench or oxygen sensor socket and ratchet set. Press the electrical connection together until it clicks. Repeat the process on the second sensor if needed.

    6

    Raise the car with the jack so you can remove the jack stands. Return the car to the ground. Attach the negative battery cable and tighten it with a wrench. Close the hood.


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