The Auto Stop/Start button in my 2020 X5 M5.0i has stopped working. When I press it, it does not disable the Auto Stop/Start functionality, it does not click (and provide haptic feedback) like the other buttons, and it does not light up to show that Auto Stop/Start has been disabled. The buttons directly above it all seem to work perfectly..
Ignition coil "A" malfunction. The start/stop issue and warning light were only a symptom. The main problem happened on a short trip a couple of weeks ago and this time illuminated the check engine light. After pulling the code (P2303, i believe) it led me to the ignition coil and/or spark plug.
Every so many years, the most idiotic ideas come around and are worked into car designs. Vinyl roof, start disabled until seat belt is buckled and those traveling shoulder belts over the top of the door window that got grease on the shoulder of your clothes or Cadillac's 4-6-8 engine to mention a few. The start/stop feature is just as stupid.

When you stand still for more than 20 seconds, it is benificial to turn off your engine. Leaving it running will consume more than starting it again. With start/stop technology, the car will not auto-stop when for example the car is too cold, battery level is too low. The computer generally has more info than you, and better (car-specific

The stop/start unavailable warning also appears because of these parameters: Open door or hood. Unfastened seatbelt. Heated windshield. Climbing on a high slope. Active parking assistant. Overloaded ventilation. Faulty battery sensor. Faulty air mass sensor. Read the owner’s manual or guide to learn more about your car’s stop/start system.
Refer to pages 166-167 in the 2015 F-150 owners guide/manual. Auto-Start-Stop. The system helps reduce fuel consumption by automatically shutting off and restarting the engine while stopped. The engine will restart automatically when you release the brake pedal. In some situations, your vehicle may restart automatically, for example: - To If the amount of fuel required to operate during a cold start is not received by the engine your car will stall. 3. Bad Intake Air Temperature Sensor. A bad or malfunctioning intake air temperature sensor can create an issue with the air-fuel mixture of your car, causing it to stall or run rough. The computer relies on the IAT sensor to CBATMOB.
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    • is auto start stop bad for engine