does the oil temp sensor in transmission do not change speed?

What is your question?

my car was not riding for a few months and now when I start it my transmission when I put it in "D" to drive it shift to hard and when it rides it won't change speed. I think it is in 2nd speed only it rides..i google and only thing I found is that the OIL TEMP SWITCH maybe the problem. If I change it and DOESN'T what else it may be?? can you help me pleas..

What makes this problem better or worse?

it's worse when the engine is cold

How long has your 2002 Hyundai Sonata had this problem?

a few weeks ago