homichael

Hello All - I got an CEL P0137(O2 Sensor Circuit Low Voltage)(Bank 1 Sensor 2) on a IS350 from Torque Pro android app. I found almost all the answers on CL to all by questions but I still have a few.

To confirm location - Bank 1 Sensor 2 is mid-pipe passenger side?

Do I need to remove the passenger seat to get to the O2 disconnect harness?

I have purchased (1) Denso 234-4521 to replace the 'issue' O2 sensor.

Thanks for time!

istarzan

iTrader: (8)

I think I had the same code right before my alternator died. Have you had it checked? In my case the alternator was dying so it didn't have enough power to push to the sensor, low voltage.

homichael

I have not gotten my alternator checked. I will stop by auto zone and see if they can run a test! Thanks!

NYKnick101

Bank 1= Passenger side
Bank 2= Driver side
Sensor 1= Before cat/Header
Sensor 2=After Cat

Bank 2 Sensors are under the seats. if you lift the motorized seat all the way up and forward you can have enough room to access the clips. and has to be pushed down under neath the car. it will be easier to remove the seat, its only 4 bolts and a harness. probably an extra 10 minutes really.