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#1
09-26-2020, 05:35 PM
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2006 X5 M54 battery voltage discrepancy secret menu vs real measurement...
Car is 2006 X5 M54 with 133K miles, runs fine.
I just checked the battery voltage with engine OFF after a 1h trip. Measurement roughly 30 min after the trip... - Key in position I: "secret menu test 19, then function 9" says battery voltage = 12.1V, which is impossible bc this is after 1h trip. - Opened the hood and measured using 2 separate voltmeters battery voltage = 12.6V, which is fully charged. Has anyone here noticed this discrepancy before? I trust my voltmeter more than the OBC of the E53...
__________________
1998 E39 528i 5sp MT 2006 E53 X5 3.0 6sp MT 
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