Possible Causes
WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.
INTERMITTENT CONDITION
OIL PRESSURE INDICATOR CIRCUIT SHORT TO GROUND
OIL PRESSURE SWITCH ALWAYS CLOSED
OIL PRESSURE SWITCH ALWAYS OPEN
OIL PRESSURE WARNING LAMP INDICATOR BULB OR SOCKET
OIL PRESSURE INDICATOR CIRCUIT SHORT TO VOLTAGE
FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
OIL PRESSURE INDICATOR CIRCUIT OPEN
INSTRUMENT CLUSTER