why is the DSC 4x4 Indicator lamp flashing on when I make a hard right turn?

Hello, the DSC indicates a stability control concern, and the 4x4 is related to that. It's likely that you experienced an event that compromised the stability control system, and it is hopefully "normal" and "isolated". If the concern reoccurs during normal driving, you could have an issue within the stability control system that will require a diagnosis. Monitor how things go, and if failures become more consistent, then definitely reach out to a technician near you for guidance.