My car's oil pressure bottoms out when I come to a complete stop, or am stopped. Any ideas?

I checked the oil in my car and it is for sure full. When I first start driving, the car is fine. After it has warmed up, and I begin to stop, as soon as it shifts down into the lowest gear, the oil pressure plummets all the way down to the red 'L'. The same happens when I am completely stopped.





My car is a 92 Saturn SL2My car's oil pressure bottoms out when I come to a complete stop, or am stopped. Any ideas?
i agree with the bad bearings answer. It happens after alot of miles. They only show when warm because the cold oil is thick enough to fill the gap in worn parts.My car's oil pressure bottoms out when I come to a complete stop, or am stopped. Any ideas?
I hate to be the speller of doom, but sounds to me as if the bearings in the engine have got to much clearance from wear. There is a chance that the sending unit for the oil light is defective. In either case, when you come to a stop the engine slows down, the oil pump also slows down, and dose not make as much pressure, or produce as much volume. Most sending units will close at about 4 psi. and as the pump slow, it can either not keep up with the need for pressure cased by the worn bearings, or because the sender is weak, it illuminates the light sooner than it was designed. And as for the issue that dose not seem to exist when it is cold, the oil is thicker and holds better pressure.
Oil pressure always is lowest at idle with a warm engine. That's just how it works. The more revs you are pulling the higher the oil pressure. The oil pump is probably driven off the crank on this engine so the higher the RPM the faster the pump spins and the more oil pressure you havee. At idle the engine will be lightly loaded and does not require a lot of oil pressure.
Is idle speed may be too low. If it is normal speed(or close to) and the weight of the oil is 10W30 and you can't get any oil pressure - you either have a faulty oil pressure guage (that happens) or your oil pickup is not picking up any oil(meaning your oil pump is history) meaning the engine needs an overhaul yesterday. No oil pressure and it will seize.
it is not your oil pump or else your engine would be fried and or you would here valves ticking but if you are hearing those sounds from your engine then yes it is your oil pump. In this situation if all is running fine then all it is is your oil pressure sending unit.
May be the oil pressure sending unit. or just the oil pressure sensor is shorting out.
oil pump new oil and oil filter
There is a short somewhere, this happens in older cars
prolly bad oil pump, Looks like its not functioning properly at low RPMs. When you rev see if the pressure goes up, It is possible its a bad gauge, or the electrical system is being stupid.