Q: Engine light is on. Code is for a o2 sensor. Dealer can't find anything wrong. Your thoughts on the matter?
I've already replaced the particulate filter, just did a EGR clean and engine light is back on with a O2 sensor code. Dealer can't find anything wrong. Any ideas what is wrong with my POS?
My car has 100000 miles.
My car has an automatic transmission.
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