Is a reflash of the ECM necessary
I have gotten a Check engine light a couple of times, and then soon after it goes off. I hae a mechanic pull the codes and it is saying that Back 1 and 2 O2 sensors are staring to fail. He suggested...
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That is correct. IF just the O2 sensors needed to be changed I can do that with little to no problem. Just a re-flash for new O2's seamed a little bit off. Granted with newer and newer vehicles things changed this one just did not add up in my mind.
