I have an 02 Isuzu Axiom and my check eng light came on. I ran a diagnostic and came up with P0155, O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1). I just replaced the O2 sensor and within a day my check eng light came on again. I want to know if I replaced the correct one. I did the one on the passenger side in front of the Cat? If that is the correct one, any insight on what the problem may be? Thanks for any help!!!