+3 I have had this problem after service and MOT (using main JAG/LR dealer), quite common fault, although it shouldn't be. If the OBD session is not ended correctly, before unplugging, it leaves the electrical system "hung up" in service mode and system will not shut down. I disconnected the large negative wire (from battery) where it bolts to the boot floor and reconnected after approx 30 minutes. Cured the problem. Note--- make sure the door has been unlocked (alarm now disarmed) and opened and shut again (to prevent it from self locking) as this prevents the alarm going off when you disconnect the negative wire. Also do not shut the boot while battery is disconnected, as you will not be able to open it again (no power for "open" boot button). You will need to reset the electric windows (auto function) and the time clock.GusA wrote: ↑Tue Feb 09, 2021 5:21 pm Sounds like a common issue after use of the OBD port in that the electrics won’t shut down. Solution is to disconnect the battery for a couple of minutes and reconnect, then charge it up again.
You can check by locking the car and then seeing if the hazard warning triangle light goes out after a few minutes or stays on.
EDIT---My battery was not completely flat, just "low battery" warning (i caught it in time). If yours is completely flat, you will have to recharge it from the "jump start" posts under the bonnet, enough to be able to open the boot to get at the battery, then disconnect it and fully recharge with a charger/maintainer that is suitable for AGM Batteries. Or just jump start the car and take it for a run to recharge the battery and then do disconnect/reconnect procedure.