Engine clatter my low oil pressure warning came on and i shut it off and checked oil was fine. started back up and heard a clatter and then it went away.it will only happen every so often but shut it down and wait 15 seconds or so and start back up and everything is fine whats the deal. it must be some kind of sensor.

sounds like oil pump went and locked up the engine

If your oil level is good then I would replace the pressure sensor, they are pretty cheap and easy to do.

if this unit has an over drive tork converter the tork converter or the TC valve (solenoid) might be faulty, have you tried keeping your foot on the gas a bit to keep it running ? and what happens ? also some engines have a low oil pressure warning and engine cut out , did you check your oil ???

Could be a few things, first Get it checked with a mechanical gauge to test low motor oil, clogged oil filter, bad oil pump, clogged oil sump (pick up tube) or bad oil sending unit. Then replace sending unit sensor.

The engine needs to be replaced. Clatter can be the main and rod bearings or the lifters. Lifters clatter with no oil pressure. Low or no oil pressure is usually bearings. Oil pumps rarely go bad, they are a very simple set up And work forever. I have never replaced a pump because it was bad. And running an engine for 30 seconds would not do that kind of damage. But running a long time low on oil will.

If the valve lifters are quiet you most likely have oil pressure even with gauge showing "0".Sounds like the oil pressure switch going bad.I would try that first.

car needs oil pressure or bearings will wear out in short time. Do not drive or start engine with this light on. Might only be pressure sending unit. Can replace sending unit and start briefly to see if problem resolves. If light still stays on, shut off engine and have oil pump replaced.

If your oil pressure light comes on
Don't ignore it. An oil pressure warning light (or low gauge reading) means one of two things: either your engine has dangerously low oil pressure (for a variety of reasons which we'll get to in a minute), or the oil pressure sending unit that triggers the warning light (or operates your gauge) has failed.
The question here is whether you have a serious problem or a minor one.
First, do not keep driving if the oil warning light is on or your oil pressure gauge has dropped. Stop the engine, let it sit for a few minutes, then check the oil level.
Is the level low? If the oil level is down more than two quarts or no oil is showing on the dipstick, adding oil to bring the level back up to the full mark may be all that's necessary to make the light go out. Just keep your fingers crossed that you haven't damaged the engine from running it too low on oil. If you hear rapping or knocking noises the engine starts, you're too late. The damage is done and now you're stuck with the consequences.
Note: On some late model vehicles, the warning light will come on (or a message will appear) if a sensor in the oil pan detects a low oil level. The light is supposed to come on before the level gets low enough to cause any damage.
If your oil level was low, it means your engine is either leaking oil or burning it. Leaks can be fixed by finding and replacing leaky gaskets and seals. Sometimes the oil filter will leak if it isn't installed or tightened properly. But an oil burning problem means the valve guides, rings and/or cylinders are worn or damaged and more costly repairs are needed.
If the dipstick shows a full oil level, then low oil obviously isn't your problem. The oil pressure may be low because of a worn or broken oil pump, a plugged oil pickup screen in the engine's crankcase, possibly a plugged oil filter or excessive bearing wear. Or, the oil pressure may be fine but the oil pressure sending unit has failed. Further diagnosis will be required to determine what's wrong.
Should you attempt to drive your vehicle home or to a service facility?
It's risky. If the problem came on suddenly, your engine does not have a lot of miles on it (less than 60,000) and you noticed no unusual noises (no valvetrain clattering or engine knocking), there's a good chance that all that's wrong is the sending unit. But, there's no way to know for sure without actually checking the engine's oil pressure with a gauge, or replacing the sending unit to see if a new unit makes the light go out. If the problem is only the sending unit, your engine still has oil pressure and you can continue to drive it until the sending unit can be replaced. But, if you're wrong you risk ruining your engine.
If you think you might have a low oil pressure or oil delivery problem because of a bad oil pump or one of the other problems we mentioned, do not drive your vehicle. Doing so only increases the probability of further engine damage. Have the vehicle towed to a service facility for repairs.

YOUR OIL PRESSURE SHOULD COME UP QUICKLY AFTER THE ENGINE IS STARTED. IF THE ENGINE IS CLATTERING THE THE PRESSURE IS LOW AND YOU MUST FIND THE CAUSE OR ENGINE DAMAGE WILL RESULT. IF YOU NORMALLY HAVE GOOD OIL PRESSURE CHECK THE PRESSURE SENDING UNIT. IT MAY HAVE GOOEY OIL DEPOSITS PLUGGING THE PASSAGE. OR, IF YOU HAVE ACCESS TO A MECHANICAL GAGE CONNECT IT TO THE OIL PORT AND GET AN MECHANICAL PRESSURE CHECK.