Hey everyone, I have an 06 Silverado that keeps throwing a double code. The code numbers are P2A01 and P2A04. Both codes come back as oxygen sensors, bank 1 sensor 2 and bank 2 sensor 2. When I look up the information on these codes, all it says is that they are performance codes. I have talked with several repair shops and none seem to know what this code is or what causes it. I was thinking exhaust leak, but cant find one. Could it be bad sensors since they both appear to have been replaced?