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Mazda
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2004
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3 i, Automatic
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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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Diagnostic procedure
Diagnostic procedure
Fig 1: DTC P0403: Diagnostic Procedure Chart (Steps 1-8)
Courtesy of MAZDA MOTORS CORP.
Fig 2: DTC P0403: Diagnostic Procedure Chart (Steps 9-11)
Courtesy of MAZDA MOTORS CORP.
Courtesy of MAZDA MOTORS CORP.
Courtesy of MAZDA MOTORS CORP.