2005 Passat wagon. I purchased this car with a new (re-man,) turbo about a month ago. Until yesterday it's had a full throttle slight stumble noticable at hwy speeds, but otherwise drives good. I can get it to go into LIMP mode if I bring the RPM's over 3500 and full throttle. I just hadn't had a chance to chase that down as it's hardly an issue during regular driving. Yesterday just driving normally it went into limp mode and gave an Emmissions workshop error. Restarting did not get rid of LIMP so I had to drive about 70 miles home in limp. Not enjoyable at freeway speeds. Got home and scanned with VAGCOM and the following is the only code: First occurrence: 16683 - Boost Pressure Regulation P0299 - 000 - Control Range Not Reached Freeze Frame: RPM: 3150 /min Torque: 268.0 Nm Speed: 122.0 km/h Load: 68.2 % Voltage: 13.91 V Bin. Bits: 00101000 Absolute Pres.: 2295.0 mbar Absolute Pres.: 2590.8 mbar Readiness: 1 1 0 0 0 Another occurrence: 16683 - Boost Pressure Regulation P0299 - 000 - Control Range Not Reached Freeze Frame: RPM: 2835 /min Torque: 196.0 Nm Speed: 57.0 km/h Load: 69.0 % Voltage: 13.83 V Bin. Bits: 00101000 Absolute Pres.: 2305.2 mbar Absolute Pres.: 1764.6 mbar Readiness: N/A If I keep the VAGCOM connected and clear the code on the fly the car drives great. I can keep it out of LIMP if if go real easy on the throttle. I'll be logging things on the way home, but just wanted to check with everyone here to see if there is a common suspect for this code without any other code. (just taking a shot in the dark...lol.) Advise?