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Anyone had P2272 (O2 sensor) code on an M156?

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Old 09-24-2019, 08:29 PM
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15 S550 4Matic, 86 560SL
Anyone had P2272 (O2 sensor) code on an M156?
My car has been idling rough since I had the engine mounts changes a few weeks ago. Today it finally popped a CEL - P2272 (Lean O2 sensor on Bank 2). Any ideas if this is really the O2 sensor, or an indication of an intake manifold leak? Couldn't find much on a search.

Thanks,
Cyrus
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