2015 F26, I've a fault light on the dashboard, so I replaced the defective bulb D1S and I'm still getting a fault light on the dash, I swapped over the bulbs and it's still not working, I plugged in a OBD scanner and I got error code 800606 I did some research and the fault information states I've dropped below 9v at some point and it's caused the bulb to break, now I'm presuming that I'm only doing short runs in the car and the battery is not charging but this is just a hypothesis I've a trickle charger to help
