Maini

The same happenned in my VW passat... and it was actually the valve in the A/C system... they had to replace that valve and fill the gas again. They say this happens when the valve in going bad... I dont recall what exactly was the valve but some dryer valve etc...

SmithsonGA

behind the catalytic converter heat shield. Long black tubes, just flip up the ends that are stuck.

Luxurytax

I just wanted to add to the thread and say that I recently had this problem. I fixed it last night.

I placed the car on jack stands and removed the tranny cover underneath the car and located the two hoses on both sides on the tranny. Then I used a long extension to smack around the hoses to release the flap and warm water poured everywhere.

Problem solved

To anyone who finds this thread, using a car lift or lifting your car high enough for you to put your entire body under the car is a must. If not, you will suffer big time due to frustration.

I HIGHLY recommend jack stands.