Please help!!! 02 Sentra Question

I'm driving an 02 Sentra with the 1.8L engine, and I pulled my codes for the check engine light, and got the following...

P0031
H02S Bank 1 Sen 1
Heater Circuit
Low

This thing has 4 oxygen sensors, and I don't know which one it is. Anybody know which on is bank 1 sensor 1???

I'm driving an 02 Sentra with the 1.8L engine, and I pulled my codes for the check engine light, and got the following...

P0031
H02S Bank 1 Sen 1
Heater Circuit
Low

This thing has 4 oxygen sensors, and I don't know which one it is. Anybody know which on is bank 1 sensor 1???
i believe you have two sensors bank one sensor one is your primary o2 sensor at the exhaust manifold.

i believe you have two sensors bank one sensor one is your primary o2 sensor at the exhaust manifold.


No there are 4

you must have the 1.8 cali low emissions car.
sucks to be you.
id guess its the first one after the engine