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Home >> Mazda >> 1996 >> Millenia Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 2.5L >> Diagnostic Trouble Code Charts >> DTC P0420: Catalyst System Efficiency Below Threshold

DTC P0420: Catalyst System Efficiency Below Threshold

Fig 1: DTC P0420 Catalyst System Efficiency Below Threshold

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