Hi,

P1510 is not recognized by BMW .Sometimes, without any Reason it might show up. Other times, it is for Idle Speed Control Valve Stuck. Check the wiring to it as well, make sure nothing's damaged. If not, you likely have a stuck idle valve.

P1397 is a camshaft sensor fault which is very common on these cars and can certainly make the car stall, but not usually in the way that you're describing. I did recommend replacing the sensor.Stay away from aftermarket sensors, they NEVER work properly.

Let me know, if needed further assistance.

Hope i helped you.

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