An automobile's oil level sensor is generally located inside the oil pan. This sensor measures the amount of oil in the pan and sends that measurement to the gauge, alerting the driver when the vehicle needs additional oil.
If the oil level sensor malfunctions, the oil gauge on the vehicle's dash panel may not work properly, resulting in the possibility of the vehicle losing oil or oil pressure without the driver's knowledge. The sensor is available at many auto parts stores. This sensor can be replaced by removing the oil pan, but often a qualified automobile mechanic can do the job more easily and quickly.