A bad ECM may also result in a no-crank-no-start condition if the module is integrated into the starting and/or anti-theft circuits. Engine Performance Problems The ECM manages a wide variety of engine-related components, ranging from emissions equipment to fuel injectors.
The car will see that the belt is undone and it will not deem the stop as a permanent stop and the system will not activate. If the auto stop/start function is on and the car does shut down the engine, the car will not restart if the seat belt is undone during the auto stop/start or a door/trunk/hood is opened.
The BMW must be reprogrammed for the new battery to get the battery's best performance. The life of an AGM battery is closely correlated with its average State of Charge, avg SoC >70% => ~1,000 full capacity discharge-discharge cycles. Under the best of circumstances an AGM will last about eight years. These are the seven most common signs of a bad ECU, and you have to check those symptoms to be certain your car ECU computer is going bad. 1. Car Won’t Start. Car Won’t Start. The engine control unit has control all over the car. So, the ECU computer must be working properly to start the engine and run it. Just head out to the nearest highway and go for a cruise. This is good for your battery (and can help keep your engine clean and happy, too). Auto Start/Stop Failure. Automatic start/stop systems are commonly used in modern vehicles to turn the engine off when the car comes to rest at a traffic light, restarting it when the driver releases the
In most cases, you can drive a car with a mild engine misfire. However, you will start to notice a decrease in performance. If the engine misfire gets bad enough, the car could stall or quit running altogether. If you notice the car running rough, you should stop driving it until you can get the issue corrected.

Thanks. The eccentric shaft got replaced too today. But after replacing the shaft and start the car, it goes to limp mode and says the engine need to be timed. Timing the engine, the car is driveable without go to limp mode. But a new fault code is on after driving 10 minutes.

If its dead- you won't need the bucket. -Pull the back seat (lower cushion) out and listen for the pump- its easier to hear with the seat out and the insulation removed. -With the seat out you can check if there is power to the pump at the harness while cranking.
1) Use the button. 2) Some say a quick off, then on again action on the brake pedal as you come to a halt will cause the car to ignore the auto off / restart squence. But you need to do it everytime you come to a stop, i.e., every light, etc. 3) Code the car so that its disabled by default.

However, you want to skip this step if the car message comes on and the drivetrain goes into limp mode. In this case, it’s best to simply get the car where it needs to be, because it might not start again once you shut down the engine. 2. Inspect Engine. Before you go any further, it’s best to take a quick look at the engine.

Wow the dealer took you for a ride, the oil level sensor will not stop your car from running. most likely is was the faults from when your replaced the cam sensors (which will stop your car from running) and yes your autozone scan tool will delete the oil level sensors out of the dme. generic scans tool just scan dme (and maybe the egs no sure
Battery consumption: Most of the electrical systems in cars such as the air conditioning system, the engine cooling system will stop working when the Auto Start / Stop system stops the engine. Because these systems consume a lot of electricity to operate, and the battery can only be used for a short time. Steps to Disable BMW Auto Start/Stop
John MS said: If the question is whether the starter will wear faster with auto stop start on than off the answer is obviously yes. It's duty cycles. That begs the question of how long before the starter wears out. My guess is it will last for longer than you own the car.
07 118i auto stop start engine - doubting thomas : The car is advertised as 'the automatic start/stop function helps you to save fuel and reduce emisions. To do so the system automatically switches the engine off while the vehicle is stationary such as in a traffic jam or at traffic lights. dwtlq.
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    • is bmw auto start stop bad for engine