MBWorld.org Forums - P0400 EGR Flow Malfunction

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jmiaebrown

06-04-2007 06:05 PM

P0400 EGR Flow Malfunction

Hello,
Engine light came on again today. Showing a P0400 code. Does anyone know what this means for W220s? Searched but didnt see any in our section? Can someone please give me the run down?
This happend after I recently got it inspected.

Thanks.

jmiaebrown

06-06-2007 09:21 AM

Wow. No responses?
The CEL went off after taking the gas cap on and off a few times. Stayed off for a day and then came back on this morning. Still showing codes 0400, 5087, and 5088. Any help would be greatly appreciated.

Thanks.

johnny7623

06-06-2007 05:11 PM

Quote:

Originally Posted by jmiaebrown (Post 2250012)

CODE P0400 E.G.R system problem, check E.G.R vacuum lines

jmiaebrown

06-08-2007 09:20 AM

Quote:

Originally Posted by johnny7623 (Post 2254203)

CODE P0400 E.G.R system problem, check E.G.R vacuum lines

Thanks Johnny. The CE light went off again after I filled up at Exxon. I haven't checked to see if its still throwing codes. It may be a faulty gas cap.

jmiaebrown

06-20-2007 03:08 PM

EGR Seal

Is this the part that will fix the EGR valve leak?

http://www.performanceproducts4benz....aust+Seal+Ring

phirama

09-19-2010 10:22 PM

P0400 EGR VALVE PROBLEM

hey i have w220 mb with p0400 egr valve code. As everyone recommended get it clean, i did that. I cleared all the failed codes and drove it for few mils, checked it back up, the engine light backs on. same code came on..check all the vaccums,tubes, voltages, all good.. help

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