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2017
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IS 300 F Sport
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Repair and Diagnosis
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External Pages
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Different car
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Section 125 (Engine Control System (4GR-FSE) - Diagnostic Codes (3 Of 5))
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SFI System
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DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1); DTC P0430: Catalyst System Efficiency Below Threshold (Bank 2) [04/2013 - 08/2015]
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Typical Malfunction Thresholds
Typical Malfunction Thresholds
WARNING:
This page is about a different car, the 2015 Lexus IS 250 and 2014 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
Oxygen Storage Capacity (OSC) of catalyst (Normalized)
Less than 1