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P0400 Diagnostic Trouble Code Discussion for December 2019

Exhaust Gas Recirculation System Flow Malfunction

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Trouble Ticket Help Requests for DTC P0400
Help Request Posted
2003 Subaru Outback 2.5L MIL Lamp on VIN: 4S3BH67513
P0400: No EGR flow. ... 2.5 motor. Code P0400 keeps coming back. I cleaned the ports then I replaced the EGR valve and checked that no broken wires or unplugged connectors. There is a self test connector under the dash (green) that I plugged in and with KOEO EGR valve and ot...
December 07, 2019