w211 e320 cdi Unknown problem, Turbo, EGR or something else?

  • Hello,


    i have a problem with my w211 e320 cdi with om642 engine. several days ago when i normally cruising car went into the limp home mode. i turned off and on the car problem goes away and immediately come back after 0.5 mile. so, day after i went for diagnosing the problem master defined the EGR disfunction problem. and he unplugged the EGR electro connector. so , car didnt goes into limp home mode but power decreased after that. 1. EGR cleaned by another master but problem still there. 2. EGR replaced but problem still there another diagnostic result showed turbo problem. turbo actuatos seems ok. is the problem can be Exhaust back pressure sensor ?


    Please help


    I didn't find the right solution from the internet.


    References:
    https://www.obd-codes.com/forums/viewtopic.php?t=13918
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    Thanks

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