OMGDODGE

does the misreading tach have an effect on the turbo waste gate or turbo in general? as this is all computer control.

BigIron70

Only if setting a code, perform cluster test, key on while holding odometer reset in. Watch movement of tach needle should swing 5-3-1. if not then replace cluster.

ColinP

There is a cheap fix out there for the '06 tachs that involves just removing a few torx screws from the perimeter if the back of the cluster. Do a search, several people have had good results. I ended up replacing the entire cluster before I was aware of the cheap fix.

OMGDODGE

Thx! Tach is an issue just typical of what you get for your tens of thousands of dollars these days!

mykaos

Oh, that and a nav / sat radio that loves to "crash". But rest assured, the problem wasn't confined to just us. My fiance's '12 Avenger shares the joy . (Love the car otherwise )

mwheaty

https://www.dieseltruckresource.com/...x-t311818.html

i did the fix, helped for about 3 months, then stopped working again, only works now when cruising on the highway, in town doesn't work worth a ****

good luck

GhettoVaquero

I replaced the sensor (dealer item, $26) on mine and it worked for all of a week. I idle at zero again. Could it be the tach itself?

rockcrawler304

Have you tried the 30 minute fix?
I'm 99% sure it is not the tach.

GhettoVaquero

This wizardry worked! Thank you!!!!!!!!

KWKING

The real issue is most likely cold solder joints or cracked circuit board lands on the instrument cluster
Removing screws takes tension or flexing out of the picture and improves the poor connection so that in most cases the tach now works
But thats not the proper fix, something else is wrong. Still saves money if it works but if I were to remove my cluster I would be looking a little deeper.

rockcrawler304

Glad it worked!!

toomanytrucks

Hello everyone it's been awhile since I've logged back in but my original fix on my 06 tach is still working and not once has the tach messed up since 2014! "Knock on WOOD"

usmilret

I know that it has been some time since this thread was active like coming up on three years. The issue is important enough to update. Remove the dash cluster and set it on a bench. Remove the backing to where you can access the cold welds on the back. Retouch those cold welds with a soldering gun and reassemble. There is some shimming that needs to be done when reassembling and when all is back together your RPM gauge should be working. There are many examples of just what I described on youtube. This worked out perfectly for me.
2006 Dodge Ram 2500 5.9.

haily grace

Did you get any codes when it happened ?

usmilret

There are youtube videos on repairing the dash gauge assembly. It worked for me. The dash gauge assembly went through a cold soldiering assembling process that was substandard and defective. Remove the dash gauge, flip it ver and re soldier the joints. Place a couple of shims on the back side of the dash and your RPM is repaired.