check engine light

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Re: check engine light [Re: ErikB] #792950 03/04/07 11:23 PM

Joined: Jun 2005

Posts: 447

Orange, VA

eleet

Mudrunner

The front o2 sensor is for regulation and the rear o2 sensor is for monitoring. OBD2 vehicles are required to monitor cat efficiency.

So, the lean condition is being detected by the front o2 sensor.

Unless you are dropping codes related to cat efficiency (P0420) then it is my opinion that replacing the rear o2 sensor is not worthwhile.

Both o2 sensors on the 3.4 are in "bank 1." Sensor 1 is in front, Sensor 2 is in the rear.

Entire Thread
Subject	Posted By	Posted
check engine light	sluggo	02/26/07 06:28 PM
Re: check engine light	ErikB	02/26/07 10:39 PM
Re: check engine light	sluggo	02/27/07 12:48 AM
Re: check engine light	4xGeek	03/04/07 10:54 AM
Re: check engine light	eleet	03/04/07 11:23 PM
Re: check engine light	jmoser	03/05/07 08:14 PM
Re: check engine light	mikem	03/05/07 07:24 PM

Moderated by 4x4Wire, Dandeman, ErikB, kewlynx

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