I have an 04 GU III patrol 3.0td with a problem oil warning light. Initially the light would remain on constantly. I changed both oil pressure sender switches both left and right. I even replaced the right one twice as I thought it may have been faulty. Failing this I also have tried a new oil pressure resistor unit (located in from right kick panel) This changed nothing. Following all these failed attempts, the oil light will now only flash on when a)the car is warm, and b) UNDER 1200rpm. So recapping the light will be on at idle when the car is warm, and will turn off over 1200rpm. Has anyone experienced anything like this before??? I have had the oil pressure checked and it is perfect.