Thread: Oxygen Sensor Replacement on 4.8is
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Old 06-10-2012, 04:59 PM
cncmastr cncmastr is offline
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Quote:
Originally Posted by mgbmwx5 View Post
Why replace them if they are working fine? Any codes?
No codes, but it's generally recommended to replace them at 100k. I suppose they degrade over time, causing poor mileage.
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