Light stays on all the time when engine is running
The oil sensor is just a very crude switch.
when it glows, we check actual oil pressure using TOOLS.
we check oil levels.
and check that some one didnt wrong oil in engine.
so the switch is telling truth or is fibbing
only TOOLS (called a pressure gauge) can answer this question
no net bunny ever.
The oil light is not an indication of oil level; rather it is an indication of oil pressure. If the oil pressure is low enough to light the oil light, you should be hearing some rattling in the engine. Otherwise, it is possible that the oil pressure sending unit is defective. You are lucky if that is the case, because some vehicles are wired that if the oil pressure sensor indicates low pressure, the engine will shut down to protect itself. You should have the oil pressure checked with a mechanical gauge ASAP and take whatever corrective measures are necessary.
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