My MPV was running perfect. I shut it off & when I started it back up the Tach, Signal lights, Power/Economy switch, Hold button and a few other things don't work, The gearshift would not release(had to push the over ride button)and the transmission will not shift into 3rd gear and jumps when decelerating.

I have replaced all the fuses, the relays under the hood, Disconnected the battery cable to reset the system & nothing helps.

Any ideas would be greatly appreciated.

 

Sounds like the electrical portion of the ignition switch. Remove the steering column cover and check it with a test light. You can buy just the electrical portion of the switch so it wont cost near as much as an entire switch.