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BMW 3-Series (E90 E92) Forum
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Help with codes on 335i
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| 07-21-2023, 11:46 PM | #1 |
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Help with codes on 335i
I have an 2009 335i and a few days ago I got a CEL. I checked the codes which came out to P2098 (Post catalyst fuel trim too lean) and P0171 (System too lean). I was wondering if the two codes where related to eachother and what they are. I looked online and saw a ton of different possible causes so I don’t know where to start.
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