Electrical System Error message

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10-07-2011, 06:57 PM

#11

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My Ride: 05 545i 19" MRR GT1 Interior LED retrofit

Quote:

Originally Posted by luigi524td

Sounds to me that your shop is a "parts replacer" and isn't following diagnostic routines to isolate and fix what's really broken. Some shops simply don't have the equipment necessary to find problems and use hope as the technique ... hope that if they replace enough parts they'll actually replace the one that is causing the problem!

The alt. was tested and was de-funct (tested by Dealer). Took it to my shop who replaced the ALT. Kept having overnight drainage and he found the MPM was burning out (no signs of water damage). He replaced the battery and programmed it at my request.

So far he has put in 12+ hours trying to chase down this electronic gremlin, replacing several blown fuses after the MPM replacement, but to no avail. I finally got a code to stick tonight, but it makes no sense (bank 3 O2 sensor short circuit). The Electronic malfunction flashes, along with several warning lights, but does not throw a code.

My tech is a BMW Certified mechanic of 18 years, with all the tools and equipment.