If the starter motor was running then the engine was turning over. Actually starting I assume is what you meant, unless the engine did not crank at all when you turned the key (all you got was a "click" sound). Clarify if necessary...
Anyway, can guarantee that the cluster oil pressure reading nor the sensor itself has absolutely nothing to do with your issue.
Anyway, can guarantee that the cluster oil pressure reading nor the sensor itself has absolutely nothing to do with your issue.