Range switch and 5th gear ratio. on 2004 Honda Odyssey

My 2004 Honda Odyssey showed a check engine light and a scan shows that the Automatic Transmission range switch has an Open circuit. 1. Where is the range switch of the Honda odyssey located? 2. How do I replace the switch and do I need to reset adaptive values? 3. What is the relationship with the 5th gear ratio?

Asked by for the 2004 Honda Odyssey