M-Class (W164) Produced 2006-2011: ML280CDI, ML320CDI, ML420CDI, ML350, ML500, ML550

Code PO400 EGR valve?

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Old 04-25-2007, 12:48 PM
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Code PO400 EGR valve?

I have check engine light with code PO400 EGR valve.Any one knows what part needs to replace and how much it will cost.
Also,If I replace this part other than dealer it would be problem.
Any body can recommend good mechanic in Chicago area.
Thanks for your help
MB:ML 320
Year: 1999
Miles: 89K
Old 04-26-2007, 10:50 PM
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2020 GLE 450; 2023 BMW M2 Coupe
Originally Posted by CAUSA
I have check engine light with code PO400 EGR valve.Any one knows what part needs to replace and how much it will cost.
Also,If I replace this part other than dealer it would be problem.
Any body can recommend good mechanic in Chicago area.
Thanks for your help
MB:ML 320
Year: 1999
Miles: 89K
Try the ML63 forum.

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