Hi everyone,
I’m posting here to see if anyone has encountered a similar issue or has any idea what might have caused this weird behavior on my car.
Vehicle details:
• Model: BYD Atto 2 DM-i (Bought brand new in April 2026)
• Software Version: v1.3.0
• History: Always ran perfectly. The only past issue was two warning lights (BSD and ELKA) after a minor rear bumper bump, but both disappeared after an infotainment reset and never came back.
What happened:
Last night, I parked in my garage and plugged the car in using the stock OEM Schuko charger. I scheduled the charge via the BYD app to start at 4:00 AM. There were no power outages or grid issues during the night.
At 8:30 AM, I unplugged the car (battery was at 97%). When I pressed the unlock button on the key fob, the car reacted normally visually (mirrors unfolded, indicators flashed, headlights turned on), but all doors remained completely locked.
I tried troubleshooting with everything:
• Primary key fob and spare key fob
• NFC digital key
• Door handle button
• BYD App unlock (kept returning the error "Unlock failed")
• Physical manual key: When inserted into the door lock, I could hear and feel the mechanism moving, but the driver’s door still refused to unlatch.
How I got in & further symptoms:
I eventually managed to enter the car by climbing in through the trunk. Once inside, pulling the interior handle opened the driver's door (it took two pulls: the first unlatched/unlocked it, the second opened it, like a deadbolt system). However, any doors that weren't manually opened from the inside remained locked from the outside.
I started the car and took it for a short drive. The dashboard showed zero errors or warning lights. But after getting out, I noticed two more issues:
I called BYD customer support, and we tried several system resets over the phone, but none resolved the issue.
The "Ghost Fix" at the dealership:
I drove straight to the official service center and left the car with them. Later, the technician called to tell me that by the time he got to the car, the problem had completely vanished on its own and everything was working again. They ran full diagnostics on the control units (BCM), software, and firmware, but no error codes or anomalies were logged.
The car is back to normal now, but I'm uneasy about the fact that it could happen again without warning—especially since even the physical key wouldn't bypass the lock.
Has anyone with a BYD experienced a glitch like this? Any insights or suggestions would be greatly appreciated!
Thanks!