Hi,
Was the engine oil light lit on idle when you first bought/had the car or since the oil change?
Does the oil light come on when the engines at idle when the engines started from cold or does the oil light only come on when the engines warm?
You say the oils been charged,i take the oil filter was replaced at the same time?
What engine oil grade was used when the oil was changed?
The problem oil light could be anything from,
the wrong oil (to thin)..
like Colin says a faulty connector or faulty oil pressure sensor...
the oil filter not changed just the oil....
worn oil pump.
etc etc.
Chips.
never changed oil filter,will do tho thx for that,engine warm comes on wile tickover, goes off when reved..and how can i tell if i need oil pump and how much ,and weres the cheapest place in the uk for oil filter and pump please.and i do apprecita the help me newbie to lexus.its not the oil was doing that before change it..so might be other 2 and were is the oil connector thx..so i can check it...