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P0400 Diagnostic Trouble Code Discussion for June 2004

Exhaust Gas Recirculation System Flow Malfunction

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Trouble Ticket Help Requests for DTC P0400
Help Request Posted
1997 Geo Tracker 1.6L MIL Lamp on VIN: 2CNBJ1364V
P0400: EGR System Performance. Hello I have a repeat p0400 egr fault.I have not yet replaced anything yet.I have found and followed G.M bullitian # 00-06-04-027 to no avail.I have also followed published diag. from gm si 2000.The system seems to be working properly but code keeps coming b...
June 08, 2004
1999 Subaru Legacy L 2.5L MIL Lamp on VIN: 453BGD857X
P0400: Insufficient EGR System Flow Detected. I ran all vehicle diagnosis on the EGR system, no problems found, no excessive buil up on the EGR valve. Solenoid operating correctly, runs like a champ at all speeds. Checked all scan values, all within spec. What am I missing??
June 08, 2004
1999 Volkswagen EuroVan MV 2.8L Surge, MIL Lamp on VIN: WV2MH2706X
P0400: EGR Flow. Hi All, customer went into a carwash with engine idling while washing van & when she put into gear to leave the CEL came on & was flashing. She did not notice any problem with engine running as it seemed to be just like normal. I have looked at vacuum...
June 15, 2004