Oil Pressure Gauge

The oil gauge displays the engine oil pressure. The current flows through the 2 coils moves the pointer of the oil gauge. This is similar in operation to the fuel gauge. The oil pressure switch and sender senses the engine oil pressure. The oil sender has a low resistance, approximately 0 ohms when the oil pressure is low (0 psi). The oil sender has a high resistance, approximately 90 ohms when the oil pressure in high (80 psi).