2006 Grand Caravan SXT 3.8 litre
201k miles
Just got this van last May 2002. February 2023 transmission went out, rebuilt and new crankshaft position sensor installed.
March 2023 normal drive, instrument panel started going crazy, first tach gauge fluttering full range of gauge, then stopped. Next tach and temp gauges then stopped. Then whole panel started going nutz, gauges wild, lights blinking. Throughout, no engine issue, no check engine light, driving as normal. Stopped and when restarted, all seemed normal for a while then tach again going wild. Eventually tach quit working all together and everything else settled down. About a week with no issue, just tach quit working, all else seems as normal. Two days ago, normal driving, whole panel glitches just for a second then back to normal. Today, all seems to be working as normal except no heat, blower working fine but cool air not hot coming into passenger compartment. Don't know if that could be a result of wonky or not, just seems odd.
If you can advise it will be greatly appreciated.

 

Seriously??? C'mon guys, help a girl out here.
Current status is good. All seems ok except tach not working.
Just want to be proactive on this if I can to prevent something worse????
Please, share some expertise

 

I just saw this.
Have you tried the instrument panel reset? A few years back, my speedometer went wacky, and this solved it.
Just hold the odometer trip re-set button in until the system automatically starts a re-calibration sequence, then release the button.
Here is a youtube:

 

Wow. Thank you so much. This fixed it exactly as shown on video. My tach has returned to its normal functioning. I am truly amazed. This is all new to me, never heard of resetting the instrument cluster.

You deserve a piece of pie, or cake, or a cold beer

 

Very disturbing problem, and "stupid easy" fix, when you know what to do right? Takes all of less than a minute.
Wish more problems were that easy to fix! Glad it worked for you!
Oh, about that pie and beer...