A light and buzzer goes off after about five minutes of driving indicating low oil pressure. There is plenty of oil and its clean, what could this mean?

The oil light usually comes on when the oil pressure is low and this is caused by low oil level or low oil flow (a blockage or faulty oil pump, usually). Just guessing, but "HI" could mean the opposite, high oil level or high pressure but it is a new one to me.
Best bet is to go online and find a forum for your particular model and search in their knowledge database.

If the oil PRESSURE is low, AND you have plenty of oil in the engine, DO NOT drive it.

If the oil level is low, add oil to the "full" mark on the dipstick. Start the engine, and see if the light goes off. If the light goes off, you can drive it.

Did you buy it used? Have the codes checked.

id not drive it or even run it with low oil pressure.. boom $3000 in to rat hole?
or did the engine stall. RPM goes to zero so does oil pressure.
all normal for a stall. did it stall????????
if not check fuses.
if did, diagnose stalling, ask !

Not only does the Oil light come on when it is low, it will also come on when the PRESSURE IS LOW or if the Pressure Sending Unit has gone bad or is DIRTY.

a. If you keep driving it, you can blow the motor if it is low oil pressure.
b. If it is low pressure, it could be due to blockage of passages or worn parts.
c. You can add Diesel Fuel (1.3 quarts to your Oil, do not drive it but let it idle for 15 mins... Drain the Oil and add a thicker oil (20w-50) and see if the light goes out.
d. Put a Gauge on the Engine and check the Oil Pressure. If it is low, and the oil increase to 20W-50 or 40 weight does not help... you are looking at pulling the engine.
e. If the Pressure is normal, I would replace the Oil Pressure Sending unit.

Good Luck

Could just be out of oil. Check the oil. Don't drive it! If it has plenty of oil the oil sending unit maybe faulty.. Best have a shop check engine oil pressure with a mechanical oil pressure gauge before driving it.. Engine will be ruined if you drive it with no oil pressure.

I would replace the oil pressure sending unit first and see if that corrects this.

The Oil light is a dreaded sight, especially at idle. Usually if an oil pump fails, it dies, the same with an oil pressure sender. I had the same problem with a 97 neon, at idle the oil light comes on... (192,000 miles). If the oil used at the oil change was a thinner viscosity than what was in there, that could cause it. If not, it could be bearings going bad on the motor creating a low pressure situation. I fixed it by going to a thicker viscosity, from 5w-30 to 10w-30, and in a week the light went off... this was 7 months ago. Just food for thought, hope this helps.

it is more then likely a faulty oil pressure switch have the car running and put a lest light to it to see if you have power going in and out of it if you only have power on one side theres your problem
, john

Hi

The light and buzzer are indicating low oil pressure and therefor if there is enough oil in th engine then you should have the oil pressure tested because you could have, amingst other things, a worn oil pump, a clogged strainer or a sticking oil filter check valve

Maybe you could try an oil and filter change using a good quality oil filter?

Very best regards

Geordie