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      03-03-2017, 05:40 PM   #1
Sm2s
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Need help with this error! Does anyone know what this means?

My 2012 E92 M3 recently started showing this "Increased emissions!" warning along with the yellow engine symbol on the dash. They last for a couple of seconds before they are replaced by a permanent "Service Engine Soon" light on the dash. I pulled the codes from the car and this is what it showed:

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I'm thinking it might be a bad O2 sensor? The car turns on and runs fine, no limp mode or anything. It's just getting those errors every time.

I would appreciate any help!
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      03-03-2017, 07:47 PM   #2
Mike Benvo
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Likely the pre-cat oxygen sensor in bank 2. If not, then the post cat. Both are faulting.
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      03-03-2017, 09:22 PM   #3
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Quote:
Originally Posted by Mike Benvo View Post
Likely the pre-cat oxygen sensor in bank 2. If not, then the post cat. Both are faulting.
Should I just change both? Is it safe to drive it meanwhile?
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      03-03-2017, 09:44 PM   #4
Mike Benvo
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Quote:
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Quote:
Originally Posted by Mike Benvo View Post
Likely the pre-cat oxygen sensor in bank 2. If not, then the post cat. Both are faulting.
Should I just change both? Is it safe to drive it meanwhile?
I'd change the precat sensor first, and yes it should be fine.
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