Did you end up rebuilding the DME to fix the issue? I’ve been having the exact same two codes for my 2005 X5 4.8is. On my Carly scanner it was 2F80 engine shut down time plausibility. But On an obd2 scanner it was code P1515. I’ve replaced my alternator, checked fuses, cleaned MAF, and have had the issue for about 5 months with no luck on a fix
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