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P0400 Diagnostic Trouble Code Discussion for December 2007

Exhaust Gas Recirculation System Flow Malfunction

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Trouble Ticket Help Requests for DTC P0400
Help Request Posted
2000 Mazda 626 ES 2.5L MIL Lamp on VIN: 1YVGF22F2Y
P0400: EGR System Flow Malfunction. code has been cleared and has returned several times. i have completely tested the boost solenoid and boost sensor even monitoring the sensor during road tests. i was wondering if these motors are prone to plugging up in the intake/plenum areas? i am not famil...
December 14, 2007