2003 BMW 325i P0171, P1620, P1083 Codes reapearing - BMW Forum - BimmerWerkz.com

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2003 BMW 325i P0171, P1620, P1083 Codes reapearing

I own a 2003 BMW 325i Rear Wheel Drive and I keep getting these three codes on a regular basis for the last three months.
P0171 - System too Lean (Bank 1)
P1620 - MAP Cooling Control Circuit Signal High
P1083 - Fuel Control Mixture Lean (Bank 1 Sensor 1)

What I don't understand is as to how dangerous it is for the vehicle if I don't fix it and what is funny to me is that I have noticed that the service engine light would come on for about 2 days, then you it would shut off automatically and wouldn't come back online for 1-2 weeks. Depending on how it feels like. One time It actually took 17 days to come back on again with the same three codes.
If I use my code reader and clear the codes my self after driving the car for about 2 miles it would come back on. I use my android phone with Torque App and a Kiwi Bluetooth adapter to connect to the vehicle, which tells me in detail what is wrong with the car.

Any Help?
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