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Avalon XLS
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Engine Controls - Diagnostics
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DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1)
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Typical Malfunction Thresholds
Typical Malfunction Thresholds
TYPICAL MALFUNCTION THRESHOLDS
Number that the following condition is set:
2 times
Catalyst deterioration level (Rear HO2S locus length)
5 V or more (Varies with A/F sensor locus length)