Trying to figure out the diagnostic steps when this warning lamp and buzzer come on. The repair manual really doesn't acknowledge it from what I can find.
I would start by cleaning the strainer and replacing the filter. I actually didn't know it had a pressure light and buzzer until now. I thought my trans temperature light was coming on at idle when it's hot. Now I'm thinking it might be more likely to be the pressure light. Never had a buzzer sound. I need to service my transmission. That is the one fluid I haven't changed since ownership. It looks clean and doesn't loose much so I've just kept it topped up.