Toyota Oil Pressure Sending Unit
The oil pressure sending unit was triggers the warning light when the oil pressure gets dangerously low, or, it activates the oil pressure gauge if you have one.
If it’s leaking oil, it’s a good idea to replace it in order to protect your engine against damage from loss of oil.
If it’s not giving you a valid oil pressure warning signal, then it’s important to replace it so that you can trust it to adequately warn you in time to avoid engine damage from loss of oil pressure. In the case of the warning light, you can verify that it’s even able to give you a warning signal by checking to see that the light comes on when you turn the key to the “on” position without actually starting the engine.
At this point, there’s no oil pressure, but the key’s on, so the warning light should turn on. If you start the car, it should turn off almost immediately.
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