While reversing, the car came to a sudden abrupt halt and the check engine lamp and other warning lamps illuminated. The ignition was still active (the car was in hybrid mode, operating on battery for motive power only), I cycled the transmission to "D" and no forward movement occurred, also tried "R" and back to "D" with the same result - no movement. I cycled the ignition off and on, the engine started and the car could be moved. CEL still on. I scanned the car and found permanent DTC's U0111 (Lost Communication with Battery Energy Control Module) and U0120 (U0120 Lost Communication with Starter Generator Control Module). After several key on key off events, the CEL extinguished and battery motive power was again available. The DTC's are still in memory. This is a serious concern, the car suffered complete loss of motive power, had this occurred while operating the car on the road would have created a very dangerous condition and greatly increased risk of injury or death. Today, I checked online and found multiple reports of this exact same problem with other owners of Volvo T8 Extended Range-equipped vehicles. My car is almost new, about 160 miles and 3 weeks old. Thank you for your attention.

- Rancho Santa Margarita, CA, USA