Oil light comes on. Just got oil change. Is oil

i don't know. please check the connecting wire harness and connector. it is possible there may be a poor connection due to corrosion , oil grease or dirt. perhaps previous sensor was OK. also, you may be able to test the connecting wire with a jumper wire.

Oil light comes on when idling because the oil pressure is low or restricted. This could be due to a clogged oil filter or oil pan strainer.there are several other reasons, these would require more information.Has the car had an oil change?What is the mileage of the vehicle?

It may be your oil pressure transmitter switch at fault. There's many different oil pressure transmitter switches. Here are some generic images:
oil pressure transmitter switch Google Search
It could also be that your vehicle is due an oil/filter change.
Is your oil level ok?

It's unlikely to be your oil pump at fault.

1. Check your oil level
2. Is the vehicle due an oil/filter change?

The oil pressure transmitter switch simply tells the engine 'low oil pressure'. This usually happens at idling speed due to a faulty transmitter switch, low oil level or there's a need for an oil change as the old oil is no longer up to the job. Oil pressure switches are easily changed.

The important thing is that you aren't getting a warning light when driving at speed. If your oil level is okay and it isn't due an oil/filter change - it probably is the oil pressure switch at fault.

For your own peace of mind try adding an oil additive.

Having changed the oil sending unit it is a fair bet the oil light is operating accurately unless there is a wiring problem in addition.

Presumably you are referring to the oil pressure warning light rather than a light warning of a low oil level or high oil temperature? If you are in doubt I suggest you read your vehicle handbook.

An engine should not be operated with low oil pressure and it is risking some very expensive repairs and a lot of inconvenience if the cause is not located and rectified as soon as possible.

A common cause of low oil pressure is the engine could be dirty inside due to infrequent oil changes or poor quality oil. Another possibility is an oil pan or sump that is dented due to grounding. The suction pipe is only about a quarter-inch above the bottom of the oil pan and a relatively small dent can prevent a sufficient supply of oil reaching the oil pump.

I hope this helps.

Hope the oil filter was changed and with the OE type and the correct oil grade.
If so the oil pressure switch can be clogged and so produce the check engine light.
When applying brakes the steering vibrates as it can be due to faulty linkages in steering column, problem in the hydralics pump or fault in the steering rod bearings.
finally the weird noise from rear can be from a faulty exhaust , leak or poor joint in the exhaust or vibration of the exhaust with loose mountings.

check the wire at or near oil pressure sensor. it may be in contact with the engine or exposed wires that ground more consistently when the vehicle is traveling at high rpm.....hi sppeed....more blowing air....your light is a dummy lite ...der....and the only other possibility is not a happy one. the light only should come on when no oil is passing along the sensor. perhaps your oil is low dangerously low. go get you oil changed. if the light no longer is on when you drive off then oil is disappearing.. somewhere....never good.....the odds i feel are much greater that the wire is the cause for the flickering light. over plugged oil pump screen, no oil, failed sensor, and no note of poor vehicle performance.

if it comes on while driving down the road or while the engine is running, you may have low oil pressure due to lack of oil.Also if oil filter is cloged due to not changing the oil it will reduce oil pressure and cause light to come on. if checked and this is not it then it will be the oil sending unit and since you have a light, be shure to tell your parts house that you have a light and not a gauge.

the oil light is coming on due to sensed low engine oil pressure, this is not a level issue unless u are about 3 quarts low, oil pressure indicators don't leave any computer codes, so who ever told u that is wrong, u need to test the oil pressure with a mechanical gage when the oil light is on, until U need to confirm that u don't have a real pressure issue here or you can burn out the engine bearings, if the pressure checks ok then rplace the oil pressure light sending unit in the engine.

Take a gauge and check you oil pressure. If its not low then change the pressure sensor. If the pressure varies and the pressure is not where it is supposed to be, then drop the oil pan and look in the bottom of the pan. If you see slivers of metal then the bearings are going out. Eather the cam bearing, rod bearing, or main bearings.

First, check the oil level on the dipstick. If it is low, add the required amount of approved motor oil. If the level is correct and the light still comes on, there may be other issues.