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Go to the bottom of this post, click the link to retrieving codes, follow the directions for your year and model and post the codes here, then we can help you

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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Also, fix your profile and ADD the year of your car to it, there are MANY year by year differences

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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thanks for the help on the web site

i am learning how it work little by little

now then I have code po141 b

H O 2 sensor heater circuit malfunction

bank 1 Sensor 2

if I understand this right when

I have a malfunction on this circuit

all I can do for it is replace the sensor ?

usually it is in the sensor itself and not in the wiring 9 times out of 10

please feel free to clairify, anything that I may not be aware of

always have room to learn more and from others

thanks again for any help that you may bring my way

M.L.E.

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Yes, the O2 Sensor is likely the problem, the sensor is located in front of the cat. Warm the system up to about 120 degrees before you start to help remove the sensor.

P0141 - Heated Oxygen Sensor (HO2S) Heater Performance Bank 1 Sensor 2

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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thanks for the info

sounds good

Let us know how this turns out

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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