Codes P2757 and P2757

I see but it doesn't say when I should do that. When filling it cold until it comes out of overflow plug, push the pin in and start the car, let it get warm, then add more? If I do that I wouldn't be able to know what temperature is the fluid at since I use the scanner and I assume the pin am gonna push has to do with telling me what temperature it is? Can you confirm from somewhere that it is a 130f before I open it up and add more? I drained twice now, black, without pushing the pin and it has gotten somewhat worse feels like it's low on fluid. So not sure when I should push the pin in and when I should release it.