error code P0404

EGR volume control solenoid valve

EGR volume control solenoid valve harness is open or shorted

EGR volume control solenoid valve circuit poor electrical connection

EGR temperature sensor and circuit

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  • P0404  it means you have problem with EGR

    It could be: Faulty EGR valve, Faulty EGR sensor, EGR sensor wiring/connector problems, EGR valve movement isn’t smooth, Carbon buildup in EGR valve

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