The pressure sensor is a $10 part, I would change that first.
Like everyone else said, it the level is OK and the sensor does not fix the error I would tow it. If your pressure is actually low the engine can self destruct in under a mile of driving.
Straight lines are for fast cars...turns are for fast drivers
'04 M3 - track
'06 650i Cab - daily driver
'02 Highlander - kid hauler
'01 330Ci - winter beater