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    P0123

    Hi, did you get this fixed?
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    Limp mode, 2800rpm max - going around in circles - Help!

    SOLVED!! Got my MB WIS working on laptop an accessed circuit diagram for EGR and associated items. This is how it went .... it seems the egr shares a connection with the throttle actuator and the cam hall sensor and the crank hall sensor. So I'm going to check for continuity and the shared...
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    Limp mode, 2800rpm max - going around in circles - Help!

    Update - Proper smoke test of system today. no leaks at all. The pressure control valve pins (two pins) have direct continuity between them. So the voltage is the same for both of them when connected 12v. Should this be so? Seems odd to me. The plug itself, when disconnected, has one terminal...
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    Limp mode, 2800rpm max - going around in circles - Help!

    One thing I need clarity on though is the talk of clearing the ECU / or ensuring "adaptaion" of the new parts. I might have thought that disconnecting the battery and discharging the ECU might have the same effect, but I could be wrong. There are many instances of dicussions about re-adapting...
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    Limp mode, 2800rpm max - going around in circles - Help!

    Possibly correct, EGR valve needed changing though. The sensors likely not but it was a quick way to comfirm. Having said that, I just should have checked them via backprobing. But at least I know know what is good. Thanks.
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    Limp mode, 2800rpm max - going around in circles - Help!

    Creader Viii Launch
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    Limp mode, 2800rpm max - going around in circles - Help!

    Hi all, well have I got a problem! Get your head around this if you can. My 2011, C350 CDI (204223)OM642 recently went into limp mode with a max rev of 2800rpm. Mileage is 68000 miles It gave a code P0402 (14A700) excess flow... I checked EGR, found signal problem and replaced EGR. (MB)...
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    New member

    Hello all. I have a C350 estate sports, with enhanced engine. Has been awesome until recently. Have now encountered a few problems!
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    Mercedes 270 CDI, P1222 P1481 U3FFF fault codes please Help

    Did you ever solve this? I have the exact same problem with the same model and year car. Cheers
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