91 240SX Auto Shifts rough into OD and Getting error code 16...This might be 2 issues or just one...

*Does any one know what the error is when the OD light flashes 16 times when the car is started? I cleared this by turning the ignition to run and then off about 40 times, the error went away, but after driving to work, the code came back when I started the car to go home.

*My car has a hard time getting into OD. I have to let off the gas for it to engage, else it stays off...
I think both started at the same time...Any ideas?
