I have a driver for my ELM 327 an it uses the pl2303 module which depends on the usbserial and this again depends on the pl2303 module.
What I tried:
sudo modprobe -r usbserial pl2303
sudo modprobe -r pl2303 usbserial
sudo modprobe -rf usbserial
sudo modprobe -rf pl2303
sudo rmmod --force...