How to optimize the fuel economy of 2nd Gen XLS 4WD

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Oct 11, 2011 | 11:10 AM

#11

ccernst

Senior Member

Joined: Feb 2009

Posts: 1,649

From: St Louis, MO

the computer tests the O2 sensors and will thow an alert for a specific sensor should one fail a test. My truck has 180k miles and I've only had to replace one sensor. I wouldn't worry about them.

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