[Tech]

Did the check engine light or shift arrow come on at all when this happens?

You might have a problem with the Park nuetral position sensor(PNP Switch)

When there is a problem the car will ususally start out in 3rd gear.And will give you some problems starting sometimes.

The PNP switch is located on the side of the transmission.It slides onto the end of the selector shaft opposite side of the linkage.

 

[Tech]

It is kind of a pain in the butt.Some people drop the exhaust system to replace it.But it can be done with out dropping the exhaust.You will also need to set the adjustment on the switch when you install it.