Look it the car's dashboard. A light will illuminate if the pressure is too low. If this happens STOP immediately, if you continue to run the engine it could seize.
It means low oil pressure. Or you have no pressure which means you may not have any oil in your car. STOP immediately, turn your car off. check oil to see if you have any.
First of all the type of a car makes a difference an in order to check the oil pressure you must know at what pressure it should be at if everything is normal. All cars come with gages and on the dash board of most you'll find a gage for oil. Refer to your owners manual for the the correct pressure it should be running at!
The oil pressure light comes on if the car is out of oil, or the oil pressure sending unit is malfunctioning. Check oil level, if oil is up to fill level then your oil pump is bad. DO NOT DRIVE the car. Have it towed to a Jaguar dealership or other reputable garage.
Assuming you mean oil pressure, check all the fluid levels NOW. You may be low on oil.
I check the tire air pressure in all the tires including the spare every oil change or before a long trip.
on some cars it means it has a bad oil pressure sensor
If the oil level is low, it may be only high enough to be pumped when agitated by the movement of the car. As the car stops, the oil settles in the pan and the intake may be sucking air which would drop the oil pressure to 0. Check the oil level on the dipstick.
If check gauges is lit and the oil press gauge is low, you have low oil pressure or a failed oil pressure sending unit.If check gauges is lit and the oil press gauge is low, you have low oil pressure or a failed oil pressure sending unit.
Check oil pressure with a manual gauge
An oil pressure switch works by detecting the pressure of the oil in the car and alerting you to any problems. Oil pressure naturally increases when a car is running, but if the pressure gets too high or drops, it can create numerous problems.
If you checked the pressure with the sending unit in the car, it is possible the sending unit itself may be bad!
install an oil pressure gauge