What's the 4121 BMW fault code?

As the owner of a BMW, You may have discovered a few different warning lights and engine codes appearing on the dashboard of Your vehicle. Most of the time, these lights mean that it is time for routine maintenance on Your vehicle, usually for fluids, filters, and various components. In the case of fault code 4121, however, it means that there is a short or loss of power traveling from the battery's voltage. You should check the dme relay, found in the main fuse box in the engine bay, for a short or damage. If it needs to be replaced, You will have to pay between $13 and $53 for parts.