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Is it oxygen sensor or air/fuel ratio sensor?
Posted to Technical Discussion Forum on 2/7/2008 3 Replies

This thing is rather strange, upstream sensos starts at about 2.5 volts cold but within a minute it settles into the 0 to 1 volt range once it's running.

The downstream is a different story, it starts at about 2.5 volts and it remains there all the time, whe... Login to read more.

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car Vehicle Data

2004 Chrysler Pacifica 3.5L

Engine3.5 L
Trans4-speed Automatic (Electronic)

car Vehicle Data

2004 Chrysler Pacifica 3.5L

Engine3.5 L
Trans4-speed Automatic (Electronic)