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Home >> Lexus >> 2003 >> IS 300 Base, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1) Or P0430: Catalyst System Efficiency Below Threshold (Bank 2) >> Diagnosis & Repair
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Diagnosis & Repair

For diagnosis and repair, see Fig 1.

Fig 1: Diagnosis & Of Repair Catalyst System Efficiency
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