Ram DEF guage problem

Mine stays on full for quite a few miles then slowly drops. No issues so far.

blofgren wrote:

spoon059 wrote:
Mine is very inaccurate, but I've never experienced anything like what you are describing. Usually mine will say full for several thousand miles, then suddenly start dropping over the next several thousand.

Mine does exactly this too.

That is the way it is designed...the gauge is not linear...see below

https://youtu.be/czJZuc8ThhI

spoon059 wrote:
Mine is very inaccurate, but I've never experienced anything like what you are describing. Usually mine will say full for several thousand miles, then suddenly start dropping over the next several thousand.

Mine does exactly this too.

Not on a street vehicle but we have had a handful of the exact same problem with Cummins powered equipment. DEF reads low, fill tank, DEF reads full, alarms keep going off and engine de-rates. Changing the sensors in the tank fixes the problems, some have had reoccurred occasionally.

Our fleet mechanics first will drain the DEF and flush twice with distilled water before changing the sensor. This has fixed a couple of the machines. Must of been dirt or contamination.

I'm starting to wonder also. Mine said 1/2 full which usually takes one box of def. I over filled last time. I do know I can go 1500 mile on one box so now I am also checking by the mileage.

Mine is very inaccurate, but I've never experienced anything like what you are describing. Usually mine will say full for several thousand miles, then suddenly start dropping over the next several thousand.

Have heard of it on Fords. The fix was to replace the level sensor.

KJ

If you are under 100k take it to the dealer.

No problems yet with mine