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Home >> Lexus >> 1994 >> ES 300 >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Tests W/Codes - OBD-II >> Trouble Code Charts >> Code P0420 - Catalyst System Efficiency Below Threshold
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Code P0420 - Catalyst System Efficiency Below Threshold

Fig 1: Code P0420 Flow Chart - Catalyst System Efficiency Below Threshold
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