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DTC P0402: EGR System Malfunction

Fig 1: DTC P0402 EGR System Malfunction: Detection Condition, Possible Cause & Hint
G00983433Courtesy of MAZDA MOTORS CORP.
Fig 2: DTC P0402 EGR System Malfunction: EGR Pressure Feedback, Vacuum Regulator Solenoid Harness Connector Views & Typical Diagnostic Reference Values
G00983434Courtesy of MAZDA MOTORS CORP.
Fig 3: DTC P0402 EGR System Malfunction: Inspection (Step 1)
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Fig 4: DTC P0402 EGR System Malfunction: Inspection (Steps 2-4)
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Fig 5: DTC P0402 EGR System Malfunction: Inspection (Steps 5-6)
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Fig 6: DTC P0402 EGR System Malfunction: Inspection (Steps 7-10)
G00983438Courtesy of MAZDA MOTORS CORP.
Fig 7: DTC P0402 EGR System Malfunction: Inspection (Step 11)
G00983439Courtesy of MAZDA MOTORS CORP.
Fig 8: DTC P0402 EGR System Malfunction: Inspection (Step 12)
G00983440Courtesy of MAZDA MOTORS CORP.
Fig 9: DTC P0402 EGR System Malfunction: Inspection (Steps 13-15)
G00983441Courtesy of MAZDA MOTORS CORP.