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On-Board Diagnostic [Engine Control System AJ]
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DTC P0401:EGR Flow Insufficient Detected
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Diagnostic procedure
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Diagnostic procedure
Fig 1: DTC P0401 Diagnostic Procedure Chart (Step 1-5)
Courtesy of MAZDA MOTORS CORP.
Fig 2: DTC P0401 Diagnostic Procedure Chart (Step 6-12)
Courtesy of MAZDA MOTORS CORP.
Courtesy of MAZDA MOTORS CORP.
Courtesy of MAZDA MOTORS CORP.