hello,
i have troublecode p1153 several times on my '01 sierra 5.3. I bought a new sensor already. On the interet the code is "Heated Oxygen Sensor (HO2S) Insufficient Switching Bank 2 Sensor 1 " . does anyone if bank 2 is the driversside or the passenger side and if sensor 1 is the first or the second sensor

thanks in advance

 

Bank 2 is passenger side...Sensor 1 is in front of the converter

 

Thanks for the answer, now i know which one i haven to replace

robbert peter
netherlands