The oil pressure indications (and limits) shift with N1 in the PW207: I would take a wild guess that the N1 feed for the No 1 engine may be amiss, sending incorrect parameters to the EDU. If the oil pressure is really out of max or min limits, of course, there would also be an OIL PRESS warning.
Not sure about the high MGB pressure, maybe the px relief valve needs tweeking?