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Home >> Mazda >> 2004 >> 6 i, 4D Hatchback, Standard >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic [Engine Control System L3) >> DTC P0420: Catalyst System Efficiency Below Threshold >> Notes

DTC P0420: Catalyst System Efficiency Below Threshold: Notes

Fig 1: DTC P0420 - Detection Conditions & Possible Causes
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