Originally Posted by Chams
I got the 19561 p3105 error code in my car. Jetta 2002 TDI.
Do you know where can I find the procedure to check the Valve for Intake Manifold Flap system?
I am not too familiar with this but I am very proactive and want to learn!
First you can check to see if your intake flapper (also known as anti-shudder valve) is working. Watch it when someone else turns your engine off. Does it close for a second or two?
This valve is located on the inlet to the EGR valve. This valve has a horizontal shaft that is oriented fore and aft. Here is a picture of it open.
and here is a picture of it closed.
Closer view of the anti shudder valve open.
If you take the large hose clamp off and look down the pipe, then you can see the actual valve internals open and close. Expect this to be oily and a bit grungy. Further down it will be very nasty looking, where your EGR valve dumps in soot. The soot mixes with the oil and cakes up quite a bit.
But what you are immediately interested in is whether or not the valve opens and closes.
A rubber hose leads to the dashpot (vacuum motor) that pulls on the shaft when vacuum is applied. The vacuum is controlled by a small solenoid valve kind of hidden under the intake runner, but you can find it if you try, by tracing the hose back to it.
The code you are getting is indicating that you have a problem in the wiring to the solenoid valve or the solenoid valve itself. It is most probably the wiring, not the solenoid.
A close inspection of the wiring will probably show a break in the wiring, or a chafed spot in the insulation.
So that is your second step.
Please thank Compu 85 and Left Coast Resident for the nice photos and illustrations.