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CES light on 04 x3

Discussion in 'E83 X3 (2004-2010)' started by poldawg, Jul 11, 2011.

    poldawg guest

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    My wife 04 x3 has a CES light on. My my code reader says "function-check tank venting", "mixture preparation bank 1 & 2". She does not top it off and the gas cap is secure, any ideas? Thanks for any help. Kerry Pohlman
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    It seems like cracked/split intake boots are common, (behind the MAF). They throw codes that imply mixture issues.

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