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Hi all,

My B5 pasat 2001, 1.9TDI AVF engine is going into overboost, sometimes it enters limp mode, sometimes not. But looking at the logs, overboost is there for sure. I have checked all vacuum hoses, no leaks. Swapped over EGR control valve and boost control valve, cleaned MAP sensor, checked turbo actuator. Nothing helped. Made 2 logs, one where car enters limp mode, one where it doesn't.
Can you give me some suggestions before I start taking apart the turbo?

Many thanks!!!!
 

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