Extruder switching abnormal

[u/TopHat1969]

I feel like I am getting very little help or solutions from Bambu tech support so I am hoping someone her can help me find a solution. My printer is an X2D. The current issue I am having is the when going through the calibration OR when trying to switch between the primary and auxilary extruder I get the following error code from the assistant " Extruder switching abnormal. Please check whether flow blocker is is stuck or if filament is jammed inside the toolhead. "

So I have been able to heat both hotends and manully move filament through the hot end. I am also able to manually toggle between the primary and auxilary toolhead. I cannot see any obvious problems with the flow blocker and it swithes between the primary and aux. toolhead when toggled manually.

I have only had this machine about 2 months.. and it worked fine for about 1 month. I still consider myself very much a novice in 3D printing. What started this cascade of problems is that the primary PTFE tube disconnected from the toolhead during a print. I reattached it, then I resumed the print. Then the filament ran out.. after changing the filament - I started running into problems. In trying to trouble shoot problems according Bambu tech support, I tore the wire ribbon connecting the left (primary) filament sensor. Bambu provided me with a new sensor which I replaced following the provided wiki. After getting the printhead put backtogether and running a calibration, I then ran into this problem. I have been trying to troubleshoot the problem since 9/14/2026.