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Trouble Code PCM P0141


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:welcomesmiley:

P0141 O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)

Examine the O2 sensor wiring and the O2 sensor. The sensor is a service item, with a relatively inexpensive replacement cost, so it is likely to simply need replacement.

Bruce

2016 Cadillac ATS-V gray/black

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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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Bank 1 Sensor 2 is going to be behind the CAT.

Ranger your post has made me wonder if my chart that i have been using for years is correct, isn't it the pre cat sensor or the front cat sensor?

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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The pre-cat sensor was discontinued during the 1998 production year.

Hmm Very Interesting, this is another one of those Gotcha Ya's... Thanks Jim

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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The pre-cat sensor was discontinued during the 1998 production year.

Hmm Very Interesting, this is another one of those Gotcha Ya's... Thanks Jim

Sorry Mike. Didn't mean to throw you a curve ball. Been gotch'd by that one myself.

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My 1998 Seville Service Manual shows two different oxygen sensor wiring diagrams in the Engine Controls section.

One diagram shows four oxygen sensors with a title that includes "(Early Production)".

The second diagram shows three oxygen sensors with the a title that includes "(Later Production)".

No dates are given but my '98 Seville came to life in February, 1998 and I have three oxygen sensors.

The bank 1, sensor 2 nomenclature was dropped. And that makes sense because the bank 1, sensor 2 is no longer installed.

Jim

Drive your car.

Use your cell phone.

CHOOSE ONE !

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Hi folks, and thank you for all comments. Still somewhat confused: does bank 1 sensor 2 still exist, and is location behind CAT correct?

Correct.

We sort of hi-jacked your thread and the question got buried in the dust. Bank 1 sensor 2 is directly behind the catalytic converter on your year model.

Jim

Drive your car.

Use your cell phone.

CHOOSE ONE !

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