Oxygen sensor replacing

The oxygen sensor monitors engine combustion efficiency by measuring the oxygen content of the exhaust gasses. The output signal from the sensor is used to precisely control fuel delivery. Any problems with the oxygen sensor will directly affect exhaust emissions and the way the engine runs.

Replacement of the oxygen sensor at the specified interval ensures that the engine and emission control system will continue to operate as designed.

^ To remove sensor (arrow) from catalyst:

• Detach oxygen sensor harness connector in engine compartment.

• Remove sensor from catalyst.

• Lightly coat the threads of new sensor with anti-seize compound before installing.


A special deep 22 mm socket for replacing the oxygen sensor is available from most automotive parts stores or from Baum Tools Unlimited. The socket has a groove cut down one side to allow the sensor to be installed without damaging the wire harnesss.

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