which o2 sensor is which?

[dgreet77]

Ok so I got a p0137 code which is Bank 1 Sensor 2 low voltage. I need to know which sensor this is, this is how I think it should be:

Bank 1 Sensor 1 - Drivers Manifold
Bank 1 Sensor 2 - Pre-Cat
Bank 1 Sensor 3 - Post-cat
Bank 2 Sensor 1 - Passenger Manifold

Is this correct? I have done some searching and found conflicting answers.

Also could an exhaust leak cause a my wideband to read lean and maybe even set this code?

Thanks.

[Fondle]

Re: which o2 sensor is which?

i dont think there is a pre cat sensor, i dont remember taking one out when putting my headers on

[dgreet77]

Re: which o2 sensor is which?

this is on a 97 bird. we have 4 sensors.

[caspernicus]

Re: which o2 sensor is which?

I'd fix it by deleting the sensor 2 and 3 codes from the tune.
They're not really important. But I'm not running a catalytic
convertor either.

Fix your exhaust leak, reset the codes, and see if it comes
back.

[dgreet77]

Re: which o2 sensor is which?

Well I drove 400 miles after clearing the code and it still hasn't come back. Haven't got the exhaust leak fixed yet, but its next on the list. I also deleted the bank 1 sensor 3 codes, because if I am correct that is post-cat and I don't have a cat either anyways....but no new sensor 2 codes so I guess I will just see how it goes.