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Scion
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2006
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tC Automatic
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Repair and Diagnosis
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Engine Performance
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Engine Control Systems
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Engine Control System (2AZ-FE)
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SFI System
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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
Rear HO2 sensor locus length
40 V or more (varies with A/F sensor locus length)
Frequency of the monitor
3 times or more