oil pressure is created by the oil pump, which is driven mechanically as the engine turns, and the faster it revs the harder it pumps. It should deliver enough pressure at idle for the light to stay off. Your problem is either a worn oil pump or your oil is too thin and needs changing. If you have an old engine, put in a heavier oil. Penrite 50 is good. Hi another possibility is your idle is set too low Also, you could have a bad or weak pressure release valve in your oil pump. (AKA bypass valve). In addition, if the oil has not been changed in a long time the oil filter may be filled with sludge reducing the pressure. Changing the oil and filter first to heavier oil is a good first step.
Your engine bearings may be worn and letting too much oil escape, resulting in low pressure when the oil pump is running slower (when the engine is running at idle). Revving the engine too high can cause damage to the rod bearings and allow oil to escape too easily. If your engine has a lot of miles on it, or if it has been run without changing the oil regularly, your engine will have a lot of wear. The oil pump, main bearings, rod bearings, and camshaft bearings may all have a lot of wear on them allowing the oil to easily escape without allowing pressure to build up. Rebuilding your engine may be needed. But try changing the oil pump first.
Needs a Tune up
you have a cylinder misfire
There is no such thing as an oil pressure light on most cars. Some cars have oil pressure gauges, and all have a "Engine" light or "Check Engine" light with a picutre of either an oil can, or Engine Block The oil pressure warning light usually looks like a little red oil can. The check engine light looks like a little yellow engine.
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
There is no such thing as an oil pressure light on most cars. Some cars have oil pressure gauges, and all have a "Engine" light or "Check Engine" light with a picutre of either an oil can, or Engine Block The oil pressure warning light usually looks like a little red oil can. The check engine light looks like a little yellow engine.
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To much oil in an engine can cause it to flood which will then lead to blowing seals. But it should not effect how the car idles.
No
an oil light is designed to come on when there is NO oil pressure or LITTLE oil pressure. that said, when your oil light is on before you start your engine there is NO oil pressure to turn it off until you start the engine.
Tire pressure will not cause a check engine light.
Oil level or pressure will not trip a check engine light.
Ask this question again specifying what the car is.