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Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 69 (Engine Control System - Diagnostic Codes (P0420-P0450)) >> SFI System >> DTC P0420-00: Catalyst System Efficiency Below Threshold Bank 1 [08/2023 - ] >> Typical Malfunction Thresholds

Typical Malfunction Thresholds

WARNING: This page is about a different car, the 2025 Lexus RX 450h+, 2025 Lexus RX 350h, 2024 Lexus RX 450h+, 2024 Lexus RX 350h, and 2023 Lexus RX 350h. However, it is still accessible from the selected car via links, so may be relevant.
EXCEPT MEXICO MODELS

Oxygen Storage Capacity (OSC) of catalyst (Normalized) Less than 1
FOR MEXICO MODELS

Oxygen Storage Capacity (OSC) of catalyst (Normalized) Less than 0.0481
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