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BMW 3-Series (E90 E92) Forum
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Hidden Diagnostic codes
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| 12-12-2011, 08:58 PM | #1 |
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Hidden Diagnostic codes
I read in a Forum about some hidden diagnostic codes. As I recall, after putting the key in, you hold down the odometer reset switch for a period of time and the dash display shows some hidden information. Anybody know how to get to them and what they all mean?
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