Hello,
It might be an extrusion system we need to clean both the extruder and the hotend
Here is a wiki on how to do it for the nozzle
https://wiki.bambulab.com/en/x1/troubleshooting/nozzle-clog
and one for the extruder
https://wiki.bambulab.com/en/P1/mai...Jv65Gy7gIT8mVEX2ceilTUpzmRsvuiQHjirhXxOt9SSkM
IMPORTANT: Please ALWAYS make sure that ALL hotend/extruder toolhead changes are done with the power OFFUnplugging and replugging any of these connectors while the power is ON could cause a short circuit and permanent damage to the toolhead boards.
Send us a few photos of the extruder filament driving wheels , when the extruder is open for cleaning
I look forward to your response.
Kind Regards
Bambu Lab Support