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code p0138 - O2 sensor, HFCs dead?
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03-03-2014, 02:17 PM
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Grindkiezer
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Join Date: Sep 2012
Location: San Diego
Posts: 824
Drives: A Car
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HFC and Test pipes are known to just foul O2 sensors. I don't think its anything major, are you sure it just isn't placebo seeing the CEL and then thinking that the car has made changes?
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