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signs your oil pressure sensor is bad
Signs your oil pressure sensor is bad: The oil pressure indicator lamp does not go out. The oil pressure indicator remains on after the engine is running. The reason for this failure is: the oil pressure sensor switch is damaged; The alarm indicator lamp lead is grounded to the sensor switch.
In case of such failure, turn the ignition switch to "D" position, remove the socket lead of the oil pressure alarm sensor switch, and observe the oil pressure indicator. If the indicator lamp is off, ground the oil pressure alarm indicator lamp lead of the instrument panel to the sensor switch. The wire harness should be repaired. The diagnosis and troubleshooting method is: turn on the ignition switch, remove the wire at one end of the oil pressure sensor, and conduct a transient grounding test. If oil the pointer of the pressure gauge moves from 0 to 05 immediately, indicating that the oil pressure gauge is in good condition. At this time, you can remove the sensor and replace the removed wire with an iron nail without a sharp head is inserted into the oil hole of the sensor for the top pressure film test. If the oil pressure gauge moves, the sensor is in good condition, and the engine.The lubrication system is faulty: otherwise, the sensor is faulty. If the oil pressure gauge still does not move during the grounding test of the wire at one end of the sensor. One end is connected to the power terminal of the oil pressure gauge, and the other end is grounded. If the test lamp does not light, the power supply circuit is open; If the light is on, it means the oil pressure gauge. If there is a fault in the body or the circuit between the pressure gauge and the sensor, the grounding test can be conducted at the end of the lead out terminal of the oil pressure gauge. If the pressure gauge moves. If it works normally, it means that the wire between the pressure gauge and the sensor is open circuit, otherwise, it means that the pressure gauge itself is damaged.The maximum pressure value is indicated when the ignition is turned on. When the ignition switch is turned on and the engine is not started, the pointer of the oil pressure gauge moves towards the maximum pressure value. The causes of this failure can be: grounding from the oil pressure gauge to the sensor wire, etc.; internal grounding of the oil pressure sensor.In case of this phenomenon, turn off the ignition switch immediately to avoid burning the pressure gauge. During inspection, remove the sensor wire first, and then turn on the ignition switch for test. If the pointer indicates no longer moving, it indicates that the sensor is shorted internally, and the sensor should be updated; If the gauge needle still moves to the maximum pressure value, check and repair the short circuit grounding point between the pressure gauge and the sensor wire.
The oil pressure alarm indicator does not work. Whether the engine is working or not, the oil pressure indicator light is not on, and the indicator bulb is in good condition. The reasons for this failure are: the oil pressure sensor switch is damaged; the lead from the alarm indicator lamp to the sensor switch is open circuit.
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