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Oxygen Sensor Locations


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Okay, so I really hope I am not as blind as they tell me! Does anyone here have picture locations of where the four O2 Sensors are on the 97 De Ville? I have searched high and low on this car and cannot find them. I need to replace the one in Bank 1 Sensor 1 but would like to know were the others are for sure. Any help on this will be greatly appreciated.

Thank you all for your time and assistance!


Sean M.

1997 Cadillac DeVille

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There is one on each exhaust manifold. One before the CAT and one after the CAT. Bank 1 Sensor 1 is on the right exhaust manifold by the firewall. It's the hardest one to get to.

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Here is the O2 Sensor Location Key:

Bank 1 Sensor 1 - right bank (rear) manifold

Bank 1 Sensor 2 - pre-cat

Bank 1 Sensor 3 - aft-cat

Bank 2 Sensor 1 - left bank (front) manifold

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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