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Re: Downstream O2 Sensor Effects on Fuel Trim
Posted to Technical Theory Forum on 1/10/2019 2 Replies

Yes and there are codes for it. Had a 2012 Benz S550 with this code.

P2097 code definition P2097 is a general OBD-II diagnostic trouble code that indicates a fault with the post catalyst fuel trim system being too rich in bank 1. This code may be seen with m... Login to read more.

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