Q&A

2000 Mercedes-Benz ML320

Question: code p0400

Question

arleycuba, Miami, FL, November 29, 2010, 22:50

 Rookie

my ml320 has code p0400 .i replace the egr valve but still this code is comin up.how can i fix this problem

2 Answers

Answer It

Flag This

Follow this Question Unfollow this Question

• Answer #1

  Pvt-Public November 30, 2010, 05:45
  

   Master

  P0400 does not mean replace the EGR valve. It means Exhaust Gas Recirculation Flow Malfunction. It could be the valves or solenoids that control the EGR valve, a leak in a hose, a clog in the EGR pipes. Further diagnosis is needed to pin point the cause.
  Reply
  Flag This
  Like0
• Answer #2

  Visitor, December 05, 2010, 12:42

  Where is the EGR located?
  Reply
  Flag This
  Like0

• My 1998 ML320 failed the emissions test on 8-21-2010
  ..., P0100-Mass or Volume Air Flow Circuit Malf, P0400-Exhaust Gas Recirculation Flow Malf, P0700-Transmission Control Sys Malf and my check engine light bulb is out.

  Q&A > Mercedes-Benz > 1998 Mercedes-Benz ML320

• Why did 1998 ML320 fail emissions test twice?
  On 8-21-10 my SUV failed the first emissions test. It gave codes P0100 Mass Air Flow Circuit Malf and P0400 Exhaust Gas Recirculation Flow Malf. On 9-13-10 Cleaned E...

  Q&A > Mercedes-Benz > 1998 Mercedes-Benz ML320

• Engineer light on and found P0400 (only one code) on the ML320 2003.
  What need to replace that P0400 (only one code) on the ML320 2003 and this engineer light on and off for the last 3 days. May possible a bad senor that indicating need to add oil (need 2 l). Any in...

  Q&A > Mercedes-Benz > 2003 Mercedes-Benz ML320