The last few thousand miles I have been having shifting problems with my DSG. Difficulty shifting as speed/acceleration increases. I queried the car using VCDS and found the above fault--the DSG was not showing any fault codes. Although the fluid and filter were changed about 25k miles ago, I drained and put new fluid and filter in. I cleared the faults and went through DSG calibration procedure. After driving it for about 250 miles, the shifting seemed to improve and almost return to normal. Today, the engine light came on and noticed some shifting problems again--staying in low gears and really dragging going up hills. I queried and found the same fault. I cleared it again but not driven car since. I expect it will come back once I start driving through full range again. Could I have an issue with my catalytic converter? Manual states exhaust issue with this trouble light. I did a quick check under the hood and didn't see any hoses disconnected or broken, but will be doing a more detailed investigation. The car has 173K on it and no exhaust parts have ever been replaced or serviced. To date, the DSG has worked flawlessly and never needed any adjustments. Does anyone have any ideas or suggestions? Thanks for any help as I am very perplexed.