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Mazda
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2004
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3 i, Standard
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Repair and Diagnosis
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Engine Performance
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On-Board Diagnostic [Engine Control System]
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DTC P0403: EGR Valve (Stepper Motor) Circuit Problem
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Notes
DTC P0403: EGR Valve (Stepper Motor) Circuit Problem: Notes
Fig 1: DTC P0403: Detection Condition & Possible Causes Chart
Courtesy of MAZDA MOTORS CORP.