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P0400 Diagnostic Trouble Code Discussion for August 2008

Exhaust Gas Recirculation System Flow Malfunction

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Trouble Ticket Help Requests for DTC P0400
Help Request Posted
1996 Subaru Impreza L 2.2L MIL Lamp on VIN: JFGC4358TH
P0400: Insufficient EGR System Flow Detected. ... code p0400 (egr fault detected) I was aware of the problem with the inline filter going to the map sensor being restricted causing the ecm to think the EGR valve isn't working. I checked that and found that it was not restricted. So I went to the valve and...
August 25, 2008