I'm trying to discover which of the 4 O2 sensors in my 2000 i30t is the Bank 2 Sensor 2. A guy here in the forum says it's the one with the BLUE wire, and the people at the NISSAN dealership parts department says it's the RED one, so what the heck ? Who gots the reason here ? PLEASE HELP, I need to change that sensor asap, my SES is coming on more often and the code that is stored in the ECU is BANK 2 SENSOR 2 no voltage ! So I need to change that damn O2 sensor, any advice, any help appreciated !

 

Fortunately for you I've been going through O2 replacement sensor hell myself since a non-dealer replaced the wrong freaking one and the battle for reimbursement has begun. I have TSB ntb02002 printed out and both the red and blue o2 sensors are on bank 2. Sensor 2 is defintely the red harnessed one if your code reads H02S2-b2(Rear w/ Red harness). The code for the blue harness is H02S1-B1 (Front w/ blue harness).