How do you know when it's time to change the O2 sensors?
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Seasoned Member
Joined: Aug 2011
Posts: 362
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From: Minnesota
Year: 2001
Model: Cherokee
Engine: 4.0
How do you know when it's time to change the O2 sensors?
Do you just wait until the engine throws a code or should they be changed on a regular basis?
CF Veteran
Joined: Oct 2011
Posts: 4,440
Likes: 3
From: Seal Beach, CA
Year: 1996
Model: Cherokee
Engine: 4.0 HO Straight Six
It should be routine maintenance. If you see your mileage decreasing that's also a sign they need to be replaced since they control air/fuel mixture
CF Veteran
Joined: Nov 2009
Posts: 8,172
Likes: 17
From: The Republic of TEXAS
Year: 1998
Model: Cherokee
Engine: 4.0L HO
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