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Lexus
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1998
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SC 300
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Repair and Diagnosis
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Engine Performance
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Engine Controls - Tests W/Codes
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Diagnostic Tests
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DTC P0420 Or P0430: Catalyst System
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Notes
DTC P0420 Or P0430: Catalyst System: Notes
DTC P0420 = Catalyst System Efficiency Below Threshold (Bank 1)
DTC P0430 = Catalyst System Efficiency Below Threshold (Bank 2)