My CEL cam on a few days ago. Engine runs well but idle hunts between 800-1200 rpm when in Park or Neutral. Ran a VAG-COM scan and the following fault codes were present:
008583 - Bank 1; System too lean at idle
p2187-004-No signal/Communication - MIL ON
00825 - Leak in Air Intake System
p2279-002-Lower Limit Exceeded-Intermittent
001287-Idle Control System RPM: Higher than Expected
p0507-001-Upper Limit Exceeded
00808-Knock Sensor1 (G61):Signal too High
p0328-001-Upper Limit Exceeded-Intermittent