MGL Avionics User Forum

My ASI has been working fine until today. While taxiing out, I got an 28 kt indication, which started recording a flight, got terrain warning etc. After flight and engine shutdown I still got a 28kt asi indication. vertical speed and altitude are correct. What is happening here?
Under the Sensor diagnostics menu the ASI shows "516"

Trapped moisture slug in your pitot line?

Should not be. Always hangared. No rain. Pitot tube always covered.