Why does my e-bikevshut down when I full throttle it

There is problem in your Throttle Sensor, you need to change that sensor..

If your e-bike shuts down when you go full throttle, it’s likely because the battery can’t handle the sudden power demand. This might happen if the battery is getting weak, not fully charged, or if there’s a problem with the wiring or connections. Sometimes, the controller shuts things off to protect the system if it senses too much strain or heat. It could also be a sign of a loose wire or a small issue with the throttle or motor. Try charging the battery fully, check for any loose cables, and avoid going full throttle right away. If it keeps happening, it’s a good idea to have a bike shop take a look.