Dash board freaking out
 

The picture shows the stored codes I have gotten. While driving the dashboard will turn on all the lights in it turn on the wipers and no speed or rpm. There seems to be no rhyme or reason as to when. The 1st it did this over a year ago changed the Neg battery connector to a battery cleaned it all shiny and put dielectric grease on it. Work great for months then 1 day it will do it again and then not again for a long time. Last month it showed a misfire code so I changed all 6 plugs as you can see in the pictures they were well used. This was June 10th and on July 17th it went all freak out again. So this AM I went and got a new ignition coil and changed it and greased all the tips with dielectric grease. Now all the codes seem to be pointing towards Trans having sensor issues.

Could this be the infamous dodge wiring harness chase? Read some wild stuff about what stopped it from happening. Don't really want to have to rip out all the wiring to chase this down.

Any tips to make this stop?

My wife is not happy since she bought it and my new teen driver is terrified to drive it. It did the freak out on me just as I get to a bridge on the interstate and freaked out the 1/4 mile I was on the bridge and the 3 miles to home every couple of seconds it would go off and basically looks like a reboot of the dashboard.

There is no stumble or loss of engine power runs fine while all this is going on. I don't want to just keep throwing parts at it.

Forgot some stuff
 

I did change air filter an cleaned air sensor on snorkel with mass flow cleaner. I do have one of the sliding doors that will power open but wont power closed.

Sorry, I didn't see what year your vehicle is and does it have the 3.6 or 3.3 engine.

forgot to say 2009 grand caravan sxt with a 3.8l v6

From what what are describing is a total buss failure. I first would the fuses in the PDC that is under the hood. Do you still have any codes that are active or stored?

Codes for today
 

https://cimg4.ibsrv.net/gimg/dodgefo...e0d592a020.jpg
If i ordered them right this is the one right after i cleared the codes. We drove all day in 93 and up temps. A/C cranked and still got 18.9 to the gallon. No dashboard freaking out. Only chime was seat belt. Could the coil pack have been a large part of this. I know it has gone months without doing it. I am suspecting the couple we bought if from had this happen and they were freaked out. About it we have grown a bit numb ro it. The van stil runs great no lags or stumble just the dash dying.
https://cimg5.ibsrv.net/gimg/dodgefo...fff05fd805.jpg
https://cimg6.ibsrv.net/gimg/dodgefo...92177ab6b7.jpg
https://cimg7.ibsrv.net/gimg/dodgefo...b6c8fc362e.jpg

You said buss?
 

My wife is like that sound expensive. What exactly would we have to replace? The van is in great shape for its age.

After 5 hours of driving.
 

https://cimg1.ibsrv.net/gimg/dodgefo...75cc1daaee.jpg
This after driving in the heart with ac cranked. Mpg at 21.1