[davedrivesody]

Is the battery drain of 0.16A excessive?

It is, but did you give the computer enough time to go to sleep? i.e. time after no activity, e.g. door open or close?

Current draw continues high while the van is awake, then it should drop when it goes to sleep. IIRC it stays awake for several minutes after the last sign of activity.

 

[davedrivesody]

Only one sliding door was open

All doors must be closed to initiate sleep.