Hi,
I take it your Chinese sensors were not reading properly either so you decided to change the batteries and now they are working fine?
I updated my 401 yesterday so I think I have the most recent version? It says on the tool information page,
Burn date 05/26/17
S/W Ver 3.12,
H/W Ver 3.0,
Sensor Ver 4.07.06.
Should I have a different version? Sorry for all the questions.