This is what I found, that supposedly causes that error code:
- Faulty Engine Control Module (ECM)
- Vehicle battery
- Vehicle charging system
- Faulty Anti-Lock Brake System Module
Read more: OBD2 - OBDII Code C2101 JEEP - Battery Voltage High | Engine-Codes.com
If it's a 2012, should be under warranty. Take it in and make them fix it.