Hard start

If you have a scanner I would recommend you scan for fault codes. If you do not have a code reader, most parts stores can do it for you or rent you one. If you do have one or rent a scanner then here is a link on how to retrieve the fault codes. If you have codes post them on here. Also try to get a scanner with live data as well. Keep us posted please.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

The first code you posted is what you need to focus on. The scanner you have is a little more advanced so it gives manufacturers specific codes. If you can get a generic code it makes it a little easier to pinpoint the area to diagnose.

For this fault code here is what they have for possible causes from the BMW repair guide.

Condition for fault identification
 Test condition:
 Throttle valve not without current
 Driver torque demand is being exceeded
 Terminal condition: Terminal 15 ON
 Voltage condition:
 Voltage in onboard electrical system >= 10 V

Condition for fault memory entry
 480 ms

Action in service
 Check mass airflow system (vacuum leaks, VVT, VANOS,
 throttle valve.)
 If frequency is >=3 Replace DME

The first thing you need to do is have the battery fully charged and tested with a battery tester. If cranking voltage is below 10 volts then it will struggle to start. Your local parts store can do a battery and cranking test to verify battery health.

Now the test needs to be done at the battery. If they do not connect the tester at the battery then the test results will not be valid. Have the battery load tested and cranking voltage test results posted and we can proceed from there. If the battery fails then that will be your most likely failure.

JIS001 is one of our best! Please let us know what you find. We are interested to see what it is.