This evening, I attempted to unlock my vehicle, but it failed to respond; neither the doors nor the trunk would open. I extracted the key from the fob and unlocked the door. The alarm activated and ceased upon pressing the start button to engage the ignition; the vehicle started properly but thereafter displayed a message to replace the remote control battery. I measured the old battery at 2.8 volts and the new one at 3.3 volts; both are CR2450 models. However, it remains incapable of locking or unlocking. I attempted to use my backup key, but it was ineffective. I installed a fresh battery in that device, nevertheless it remains unresponsive. I drove to determine if that would reset it; it did not. I connected my OBD reader and retrieved the subsequent problem codes.
804415 Radio remote control battery voltage deficiency 801a55 DWA The alarm has been triggered.
8011F9 PTC Decreased heater output resulting from power management functionality.
I erased them, leaving just the low battery remote code intact.
Upon halting and deactivating the engine, all door locks disengage as expected. Additionally, if the vehicle is stopped and the dashboard button is used to unlock all doors, they unlock and then relock upon movement, indicating that the central locking system is functioning properly. I ensured that the positive terminal of the battery was positioned on the left during installation and that it was orientated correctly.
Does anybody have any suggestions?
I have transferred this after mistakenly publishing it in the E30 area; my apologies!