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Home >> Mazda >> 1995 >> Protege ES, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 1.8L >> Trouble Code Charts >> Code P0420: Catalyst System Efficiency Below Threshold
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Code P0420: Catalyst System Efficiency Below Threshold

Fig 1: Trouble Code No. P0420 Catalyst System Efficiency Below Threshold
G95H33479
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