RPM’s Jumping

[Ruby R/T]

I have a 2012 R/T. My tachometer fluctuates between 1 and 3 regardless if I'm driving, at a stop, or at an idle. It happens when the A/C is on or off, in auto climate mode, and even when I turn the climate completely off. It's not a huge fluctuation, just small jumps. I have the most trouble when I try to coast around 35mph or less. It's acting like it wants to shift to a lower gear even though it shouldn't be and the RPM's start jumping more. Another forum suggested recharging the A/C, which I needed to do anyways, but no change after the recharge. I'm not a mechanic, I just know the basics. Any help or suggestions would be appreciated.

[XH29N0G]

This board is mostly for old chargers, but someone on here will likely be able to help. 

Unfortunately that will not be me because I don't have a present generation charger.  I wish you the best with sorting out your issue. 

[Ruby R/T]

Thanks anyways

[XH29N0G]

It would also be a shot in the dark for me.  I like the look of the new generation chargers and wish I owned one, but .....

Usually there will be someone with one on here who will speak up if they have a solution to a problem posted for the new generation chargers.

[John_Kunkel]

These new cars need to be scanned to find most electrical problems.

This $50 computer app does wonders:

https://appcar-diagfca.com/en/

[Ruby R/T]

Thanks I'll check into that