How to Determine if the Oil Pressure Sensor is Faulty?
2 Answers
There are two terminals on the oil pressure sensor: one is labeled WK, which is the pointer line, and the other is labeled G, which is the indicator light line. If the WK terminal is grounded and the pointer goes to the maximum, it indicates that the sensor is damaged. Some vehicles only have the indicator light line, and the same method can be used to test the sensor's condition. Below is some related information about the oil pressure sensor: 1. How a faulty oil pressure sensor works: The oil pressure sensor is also known as the oil pressure sensor. Its working principle is that when the engine is running, the pressure measurement device detects the oil pressure, converts the pressure signal into an electrical signal, and sends it to the signal processing circuit. 2. The function of the oil pressure sensor: The oil pressure sensor is used to detect the oil pressure of the vehicle's engine. The detected data helps control the normal operation of the engine.
In my years of automotive maintenance experience, diagnosing a faulty oil pressure sensor is a practical skill. The simplest method is to observe the dashboard: if the oil pressure warning light stays on or flickers, but the engine runs smoothly without unusual noises or vibrations, the sensor is likely the issue. Next, I use a multimeter to measure resistance—disconnect the sensor's plug and measure across the terminals; a good sensor reads between 20 and 80 ohms, while an open circuit (infinite resistance) or near-zero reading indicates failure. Don’t forget to check for corroded or loose wire connections, as these can also trigger false warnings. A malfunctioning oil pressure sensor can mask genuine low oil pressure risks, and ignoring it may lead to engine overheating, severe component wear, and costly repairs. That’s why I test or replace it at the first sign of trouble. Regular checks on this component prevent major issues—after all, a car is like a body, where small parts determine overall health.
