4.3 Alpha 1 water psi at 0

[srt8mag]

My smartcraft is registering 0 water psi on my port motor. I noticed the past couple times out that the water psi was around 13/15psi on my port and in the 30's on the starboard. Went out on Sunday and had 0 psi. Engine kept cool but the water temp. here is only in the mid 50's.
Everyone think it's a bad impeller? Anything I'm missing?

 

[Weave]

I think that is the symptom of a bad sensor

 

[white glove]

I think its is a faulty smartcraft sensor , the engine would still overheat or at least run hot without enough water circulation and because it didn't , check the smartcraft. Every instance of a bad impeller Iv'e come across showed a progressive trend towards higher than normal temps with higher rpms even though at idle temperatures read normal.

 

[d-speed]

Impeller.. Any warning horns go off?