Jeep Repair: DTC P0520, jeep grand cherokee, powertrain control module

Question
I'm getting diagnostic code DTC P0520 with my "check oil" light showing on my instrument panel...2005 Jeep Grand Cherokee 5.7 liter HEMI

Answer
P0520-ENGINE OIL PRESSURE SENSOR CIRCUIT


Possible Causes  
(G6) ENGINE OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE  
RESISTANCE IN THE (G6) ENGINE OIL PRESSURE SENSOR SIGNAL CIRCUIT  
(G6) ENGINE OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND  
RESISTANCE IN THE (F855) 5-VOLT SUPPLY CIRCUIT  
(F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND  
RESISTANCE IN THE (K900) SENSOR GROUND CIRCUIT  
ENGINE OIL PRESSURE SENSOR  
POWERTRAIN CONTROL MODULE (PCM)