I stopped by the local auto parts shop and borrowed their OBD 2 code reader to pull the code off my 09 135i when it had the Engine malfunction / loss of power icon flash on the iDrive screen. It reads: P0015 Exhaust camshaft position, timing over retarded, bank 1? Any ideas?? I turned off the car and restarted it and the code went away and the car returned to full power again?? Is this something major?
