Over Boost Condition - 2001 Jetta TDI automatic Have the following error code: 1 Fault Found: 16618 - Boost Pressure Regulation: Limit Exceeded (Overboost Condition) P0234 - 35-10 - - - Intermittent Readiness: 1 1 0 0 0 I havent yet gone back through the Limp Mode thread but figured I would throw this out there for some critic. Where should I start with this one? Too add a bit of background to this - I just replaced the lifters on the head and just finshed setting the timing and everything is running well. lots of power from start - engine starts up fine and timing is within spec - slightly advanced as I set it as such using Vag Com as the diagnostic. and set the timing using the 3 IP bolts... Also a New to me /good working used turbo that had no play and the actuator was almost brand new was installed. Cleared all of the previous codes and first day I drove it to ensure all bugs had been sorted out etc.. and runs fine - gets up to speed - shifts well (for an automatic) but still seemed to be somewhat lacking and doesnt accelerate like my 03 Golf 5spd does... I had chalked that up to the auto as it reall was pretty close. Until the CEL light came on! so afte that sat with me for the rest of the day... When I got home first thing I checked obviously and the above error code was displayed... So what could be causing the 'Over Boost' condition? I have done the Vag Com EGR mod to turn off teh EGR to 'offroad use' condition... and the vacuum line to the EGR is a little wonky - I have made a home edition of the WD40 nylon insert mod to correct this but its possible that it isnt sealing fully... what error codes would this produce?