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Home >> Lexus >> 2024 >> TX 350 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 103 (Engine Control System - Diagnostic Codes (4 Of 7)) >> SFI SYSTEM (for 1Motor-HEV Model) >> DTC P0420-00: Catalyst System Efficiency Below Threshold Bank 1 [09/2023 - ] >> Typical Malfunction Thresholds

Typical Malfunction Thresholds

WARNING: This page is about a different car, the 2024 Lexus TX 500h. 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
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