: 01 deville o2's locations?



robz
09-03-09, 05:27 PM
I tried doing a search,but came up with nothing.I need to know were the o2 sensors are located.Its a 01 deville NS 4.6.Thanks

Ranger
09-03-09, 05:57 PM
One on each exhaust manifold and one after the CAT.

robz
09-03-09, 10:57 PM
thanks

Submariner409
09-03-09, 11:01 PM
Try these................Hope you have small hands, crow's foot wrenches, and patience. And DO NOT twist any of the wiring harnesses.

Ranger
09-03-09, 11:12 PM
Oh yeah, you'll need a "special" O2 sensor socket. It's basically a deep well socket with a slot milled in the side.

robz
09-04-09, 02:23 AM
Thanks,Have a question so the bank 1 sensor 1 is the one close to the firewall right?The other 2 are easy,but the one close to the firewall seems hard.

Submariner409
09-04-09, 09:02 AM
What code are you getting that makes you think an O2 sensor is bad ?? Many times, a vacuum leak will trigger a sensor efficiency or "bank lean" code. The Northstar O2 sensors are usually problem-free themselves. Not saying that is your case, but post the codes so we can dig deeper and maybe save you some time and money.

Yes, right bank sensor is B1 S1. Look at the picture title line.