: Where exactly are the B1S2, B2S1, and B1S3 O2 sensors located?

02-24-05, 10:24 AM
1996 Deville w/N* need to know where the Bank 1-Sensor 2, Bank 2-Sensor 1, and Bank 1-Sensor 3 O2 sensors are located.

02-24-05, 10:51 AM
Bank one sensor two; in front of cat. converter.

Bank two sensor one; manifold, close to head.

Bank one sensor three; after cat. converter.

And to close the loop, bank one sensor one; manifold, close to head.

02-24-05, 11:46 AM
That's right, but I wanted to add that B2S1 is on the front manifold and B1S1 is on the rear manifold. So, from the front to the rear of the car, the sensors are in this order:

B2S1 - B1S1 - B1S2 - B1S3

Hope that gets you where you need to go.