What does an oil pressure sensor do?
Your oil pressure sensor or switch monitors oil pressure in your engine. It sends these signals to the ECU and to your oil pressure gauge or warning light. If the oil pressure sensor in your vehicle stops functioning properly, it could give false readings. The oil light may come on or the gauge may read very high or at zero.
What to do if your oil gauge is low?
The oil light may come on or the gauge may read very high or at zero. Before replacing your oil sending unit, check your oil and listen to your engine. If you're low on oil, add what is needed. If you notice any ticking or clunking noises, or the smell of oil burning, you may have other issues.