Code No. P0404: EGR Valve (DC Motor) Circuit Performance


DIAGNOSIS CONTENT



TROUBLE JUDGMENT


Check Condition
  • During the "OPEN" and "CLOSE" state of offset learning.
Judgment Criterion
  • EGR valve is jammed during "OPEN" state of offset learning.

  • EGR valve is jammed during "CLOSE" state of offset learning.

DIAGNOSIS CONTENT



TROUBLE JUDGMENT


Check Condition
  • Ignition switch: ON
Judgment Criterion
  • EGR valve is jammed.

FAIL SAFE FUNCTION



  • EGR control is prohibited.

PROBABLE CAUSE



  • Failed EGR valve (DC motor)
  • Failed electrical harness in EGR valve (DC motor) circuit