T190 hydraulic filter not connected

[msmith371]

I have a T190 and have a warning that shows they hydraulic filter is not connected. It will not run with this warning and shuts off almost immediately when trying to start. I am trying to understand how it senses if a filter is connected when the only two sensors in the filter house are pressure and temperature. I have checked all connections, relays, and fuses to rule out simple stuff, but no luck. Any help is appreciated!

 

[brdgbldr]

Just my guess, but I would think that the pressure sensor is what would give you that code. So it is probably not sensing any pressure at the filter causing the shutdown. This could be a bad sensor or the bypass valve is stuck open causing low pressure at the filter.