heralder Posted Monday at 11:36 AM Share Posted Monday at 11:36 AM 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! Quote Link to comment Share on other sites More sharing options...
heralder Posted Monday at 11:37 AM Author Share Posted Monday at 11:37 AM The key fob fails to unlock or lock the doors and trunk. New, functional batteries have been inserted in both keys. The vehicle does not indicate an inability to detect the remote fob and operates correctly when started and driven. Quote Link to comment Share on other sites More sharing options...
VVC-Geeza Posted Monday at 11:37 AM Share Posted Monday at 11:37 AM Please refrain from raising your voice, but have you ensured that the batteries are installed correctly? I have seen this issue when individuals hastily attempt to prevent memory loss or similar concerns. Could you resynchronise them as was possible with the previous versions? I have not encountered this issue myself; my apologies. What is the significance of placing the key beside the column? Quote Link to comment Share on other sites More sharing options...
heralder Posted Monday at 11:38 AM Author Share Posted Monday at 11:38 AM The batteries are correctly orientated, with the + sign pointing outward when installed. To my knowledge, the 2014 model does not need synchronisation upon battery installation. If the vehicle fails to detect the fob and displays a message such as "No remote control present," you may place the fob against the right side of the steering column housing to enable it to read the transponder in the key. Quote Link to comment Share on other sites More sharing options...
heralder Posted Monday at 11:38 AM Author Share Posted Monday at 11:38 AM I recently conversed with P. A. Roberts in Whitchurch, with whom I had previously engaged for services. I proposed a battery reset; nevertheless, he expressed scepticism over its efficacy. He believes the issue may lie in the receiver, either in the rearview mirror or in the trunk/spoiler region. Quote Link to comment Share on other sites More sharing options...
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