Where is the Bank 1 sensor 2 o2 sensor located?

2008 MERCURY MARINER
210,000 MILES • V6 • 2WD • AUTOMATIC
Avatar
ALASKA907
The car is throwing a p2270 code which is the 02 sensor, however I can't seem to locate where the sensor is or even a diagram to show where it's located. It is sensor 2 in bank 1 and should be located just below the catalytic converter but it is not.
Nov 11, 2024 at 1:25 PM
Advertisement
Avatar
JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,193 POSTS
  • ASE Certified Mechanic
Hi,

Bank 1 is the side that has cylinder 1. If you stand at the front of the vehicle, it will be on your left. (see pic 1)

Sensor 2 is at the end of the converter. On this vehicle, the catalytic converters are integral to the exhaust manifold. If you look at pic 2 below, I highlighted both sensor 2 sensors. If I am orienting myself correctly with the pictures, the manifold on the left side of the pic should be bank 1.

Let me know if this helps or if you have other questions.

Take care,

Joe

See pics below.

Images (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Nov 11, 2024 at 6:56 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.