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Reload this Page P0139, Should I be worried or is the o2 sensor just being temperamental?
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Old 10-26-2019, 10:11 AM   #1
 
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Default P0139, Should I be worried or is the o2 sensor just being temperamental?
Got a P0139 code about a month back and cleared it after seeing that it was for the rear o2 sensor. It didn't come back until about a week ago, and I've since cleared it again to see if it would immediately come back. Rear o2 sensors on some of my previous cars have been temperamental, but I want to know if I should actually be worried about this. Dumped some logs as well. Thanks!
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