Morning Christine
Welcome to the Forum
I would be concerned about your garage as the only time I have seen that code was on an X5 with an incorrectly fitted battery (IBS not connected)? First I would point out that I am not a garage just an old engineer with an insatiable need to know 😅 I also have a fully up to-date BMW Diagnostic program and have worked on my own X5's since 2002. Google the register of BMW Specialists you should find one close by
I would start with the battery, get the Voltage checked at the Charging points under the bonnet. Engine off it should show 12.5v minimum with the engine running 14.5v min. Also check the battery connections in the boot make sure the IBS (small lead) is connected
Hope this helps
Dave
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Greydog ·