E46Fanatics - View Single Post - Voltage issue, need help determining if alternator problem
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Old 01-08-2013, 02:28 AM   #3
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Join Date: Oct 2008
Location: Los Angeles, CA
Posts: 3,139
My Ride: 05 330i ZHP/MT
If the problem is intermittent, I'd suspect a ground problem, but it can be the alternator, or even an issue with the belt or the tensioner. Is there noise when this occurs, heavy steering, anything else besides the battery light?
The OBC test#9 readings look normal to me, but I suppose you didn't have a chance to check the voltage while the red light was ON.
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