Okay so my wife got a check engine light on her 2004 Zhp. When I scanned it the fault was the O2 sensor bank 2 pre cat. I did some internet surfing ( I am new to obd2 ) and found many instances where the fault was in error and changing the O2 sensor did not cure the fault. It was mentioned that the fix was to do a ECU software update that in Effect loosens up the tolerances of the O2 input.
I am heading down to my buddies shop this Saturday and doing the ECU update . Does anyone here have any firsthand input or related experiences?
I will report back my findings and observations.