Oil temp info pic is off the chart and has no num?

So oil temp gauge goes off I get no check engine light no noise I just see it as I
scroll the menu at times. it happened first after an oil change where the oil filter
cap was damaged. a replace meant order was made but mechanic said to wait
till next change to do a swap due to the fact ill lose lots of oil and its a waste.
but the car did not like that and the check engine light came on and as I check
it was the oil temp. went back did the swicth and car was good for a few days
then I started ti see the temp gauge go crazy but this time not engine lights.
What the hell is this. Could it be the oil temp sensor or the oil cooler filter
adapter or the oil pump?