Mercedes-Benz Forum - View Single Post - P0400 Code!!!
Thread: P0400 Code!!!
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post #4 of Old 08-14-2019, 07:57 PM Thread Starter
Dan Kasht
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Redliner: I watched that video before. I changed a few hoses that were bad. I see a hose deep behind that pressure sensor/secondary air pump(not sure if cracked). Does that go to vacuum system? Is this the one he is talking about in the video?

Noodles: I replaced the EGR with a new unit and cleaned the pipe reaallly well. Where the egr is connected to the exhaust, i did not clean. I do not see any smoke anywhere. Do you think i need to clean this? Can i just take thee egr off again and spray down there? If you have instructions i would really appreciate it.

Is there anything else that would make p0400 show up?

O yeah on a side note, i did clean the breather and reseal on the passenger side valve cover. I did not do the driver side. Is this a possibility?

Thank you !
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