I have had this fault happen a few more times .
I found the following codes with INPA - signal AGS code 80 90 2C .
And the following with BMW DIS -
Code 60 selector lever switch
EGS - 3C EGS transmission switch .
Digging deeper into DIS tells which of the L switches should be open or connected to terminal 15 in the relevant selector positions . The pic you posted for connection summary shows L1 L2 L4 connected to terminal 15 in the park position .
The times when the fault happened showed L1 open in the park position when it should be connected to terminal 15 .
L1 is the suspect , just need to figure how to test continuity .
I could dig deeper with DIS if I can catch it with the fault present .

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