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- 2008 Mazda5 GT
Went to the store and suddenly notice the CEL. Luckily I have a Scangauge2 connected and pulled code P0138. A quick search show that it a faulty rear O2 sensor used mainly for emissions. My 2008 only has 31K miles so I am surprised to see a faulty O2 sensor already
Seems like the rear O2 sensor is very expensive (>$200). I would usually just replace it but at this price I am tempted to try and clean it first. Anyone have good results with cleaning and if so what solution do you recommend?
Seems like the rear O2 sensor is very expensive (>$200). I would usually just replace it but at this price I am tempted to try and clean it first. Anyone have good results with cleaning and if so what solution do you recommend?