I feel there is some confusion here and the deceptionist is not helping explaining what has actually been replaced
video
https://www.rapidshare.com/files/244110873/000052.mpg
For fault code
1 Fault Found
012597 - Intake Manifold Runner Control: Lower Stop not Reached
P3135 - 001 - Upper Limit Exceeded - Intermittent
Entries:
1.12597 intake manifold flap for air flow control, lower stop not reached
or
4120 intake manifold flap 2 for air flow control
Observe video.
2. 8200 intake manifold flap for air flow control
or
8209 intake manifold flap 2 for air flow control, electric complaint
logged in the engine control unit.
Several causes for the entries under 2. Electric and mechanical component complaints on the intake manifold regulator motor (E regulator).
Production change
1. Optimised intake manifold flap with modified rods
A4: 8K5BA012968
Q5: 8R6BA010935
A6: 4F4BN007004
Q7: 4L9BD002120
2. Optimised electric regulator motor for intake manifold flap.
A4: 8E*7A200422
A6: 4F*7N123635
Q7: 4L*7N083156
A8: 4E*4N015849
Cabriolet: 8H*7K029553
Measure
1. This can be caused by a worn shaft bearing of the intake manifold flap or a worn ball end. Thoroughly check the ball ends of the flap shaft and the regulator of the rods for free play (if in doubt remove the intake manifold and inspect the shaft bearing).
If there is free play, replace the complete intake manifold flap. (A regulator replacement does not rectify the complaint!
To avoid repeat repairs both intake manifold flaps should be changed as the other side would also develop problems soon.
2. Check the E-regulator according to the repair manual ( Note: At the moment the repair is only included in the A6 repair manual, the other models are still in preparation). Replace the regulator, if all points are completed in the guided fault finding and the regulator was diagnosed as incorrect.
If no complaint is found in the guided fault finding, check the environmental conditions of the above entry.
Example of environmental condition:
1. engine speed
2. torque
3. speed
4. battery voltage
5. feedback for bank 1 (E-regulator)
6. feedback for bank 2 (E- regulator)
7. specified value (E-regulator)
• If "8 %" is logged in the specified environmental conditions in the 5th or 6th digit, this indicates an electric component complaint in the E- regulator (cylinder bank 1 or 2) . >> Replace the E-regulator.
• If "12%" is logged, this points to a feedback error from regulator to engine control unit, which is recognised by the diagnosis when driving. This points to a stiff adjustment. (Cause: for example intake manifold flap shaft seized. Replace the complete intake manifold.
• If "88%" is logged, this points to an adjustment range complaint. The adjustment range of the E-regulator is checked when switching on the ignition. The diagnosis recognises deviations when moving to the inner stops. (Cause: could be stiffness of the adjustment in the regulator or the intake manifold flap shaft.) - Detach the rods of the regulator and check the intake manifold flap adjustment. If the adjustment is stiff, replace the complete intake manifold. If the adjustment is correct, check wiring, plug, loose pins; if no damage is found, replace the regulator.
• An E-regulator is not available for all variants/model years. In these cases the complete intake manifold must be changed).