P0234 Turbo Overboost Fault

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53skee
Posts: 4
Joined: Mon Jan 21, 2013 7:14 pm
Passat model: b6 estate

P0234 Turbo Overboost Fault

Post by 53skee »

Hi,
My 2.0tdi engine code BKP is throwing a P0234 Overboost code and when put under load will go into limp mode. It's down on power and doesn't rev smoothly through the range I've cleared the EGR fault it had by replacing it and that has stayed away so far. The previous owner did have a Terraclean performed so not sure whether it would be sticking turbo veins causing the issue?Turbo is quite whistly. It doesn't seem to smoke on accerleration but does smell very fumey. It has to be driven gingerly to avoid going into limp mode.
Any advice please as to the best place to start troubleshooting?

Thanks

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