The contact owns a 2021 Jeep Grand Cherokee. The contact stated while she was stopped at traffic light, as she was taking her foot off the brake pedal to depress the accelerator pedal, the vehicle's automatic emergency braking system engaged and the vehicle came to a stop. The engine was running. The contact stated she was not aware of any warning light being illuminated. The contact had injured her right foot and was diagnosed with a torn Achilles tendon. The contact had taken the vehicle to a unknown local dealer, where it was had not been diagnosed or repaired. The manufacturer had been informed of the failure. The failure mileage was approximately 700.