Charger shows E14 and refuses to start; often associated with RFID or access control issues.

Safety first: This is a low-voltage fault, but still disconnect power before opening the unit.

• Try multiple cards: Test with more than one authorized RFID card or tag to rule out a single bad card.
• Check app settings: Ensure RFID access control is configured correctly in the BYD app or web interface and that your card is registered.
• Power-cycle: Turn off the breaker for 2 minutes, then restore power and retry authentication.
• Professional inspection: A technician can open the front panel, reseat the RFID reader connector, and test the module.
• Replace RFID reader: If the module is unresponsive, replace the RFID reader assembly with a BYD-approved part.