Location of oil pressure sensor. light stays on all the time when power on. has oil and no knocks when running.

The oil light comes on when the oil pressure sensor detects low oil pressure. The amount of oil has little to with it, although very low oil levels can cause loss of oil pressure. Since you aren't getting knocking, chances are the oil pressure sensor is defective. Replace it and monitor the situation closely. This could be a serious condition if allowed to escalated and it turns out to be an oil pressure issue.

The light is activated by an an oil pressure switch. With the engine not running there is no pressure so it lights up. When the oil recirculates, the pressure increase and the light goes out. Locate yours and change it, they are fairly inexpensive. If it stays lit after a change it may indicate something more serious.

If you feel like the engine is still ok, I would look at the oil pressure and check engine light issues.
On engines with fuel injection, the fuel pump is powered by the pump relay until the engine starts. Then the engine has to have oil pressure to keep the fuel pump powered.
Its a safety feature so if you are in a wreck the fuel pump does not keep running if the engine is off.
I would want to know why the oil pressure light is staying on and what the trouble codes are in the computer.

There is a updated oil pick up tube, call the dealer, and fix it ASAP. These engines are famous for timing chain and oil sludge issues.

the knock sensors are located below the intake plenum,or,upper intake manifold as some call it, they screw into the lower intake, the front one is sensor 1, the rear is sensor 2. it is wise to change both if you have some miles.since you are going to be buying a gasket set to do this job.the sensors are cheaper than the gaskets.

well the oil sending unit is located on top of the oil filter housing most likely its bad if not your knock sensor is bad

Hello theusbaker: The oil pressure switch is located at the left front of cylinder block .Near the knock sensor. The oil pressure level sensor is located in the oil pan. Should you need further help please just ask. Please rate this information as it does help in feedback. Thank You for using FixYa. Roger

Knock sensor found to be above the oil filter at the back of the engine slightly above and to the right of the oil pressure switch

Try a new sender unit.