An oil pressure gauge is a device used in vehicles to measure the pressure of the engine oil. It helps ensure that the oil is circulating properly, which is crucial for lubricating engine parts and preventing damage. A healthy oil pressure indicates that the oil pump is functioning well, while low pressure can signal potential problems. Typically located on the dashboard, the gauge displays readings in either pounds per square inch (PSI) or kilopascals (kPa). If the gauge shows low pressure, it may prompt the driver to check the oil level or consult a mechanic to avoid engine issues. Regular monitoring can help maintain the health of the engine.