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P0400 Diagnostic Trouble Code Discussion for May 2005

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: 2CNBJ186XV
P0400: EGR System Performance. I have done everthing listed in alldata to test this sys. Everything works properly without fail...cannot get dtc to reset myself...but, about once a week the mil comes on with no symptoms, just this code. Any experience with this dtc would be appreciated...
May 12, 2005
1998 Mercedes-Benz E320 3.2L MIL Lamp on VIN: WDBJF65FXW
P0400: EGR flow malfunction. Access fault codes p0400 code present. Replaced egr valve, checked all related vacuum hoses, replaced if ness, made sure egr port and pipe clean. light came back on within 24 hours. any help appreciated
May 19, 2005
1998 Subaru Forester L 2.5L MIL Lamp on VIN: JF1SF6350W
P0400: Insufficient EGR System Flow Detected. Code p0400 still being set!!! Still having problems with this car (see previous post) and totally lost. Have remove all lines and cleaned. None were plugged. Bpt sensor was faulty. Replaced. No change. Tried know good used egr valve. No change. Solenoid was r...
May 27, 2005