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Scion
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2004
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xA Automatic
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Engine Control System - Diagnosis
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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
Detection Criteria
Threshold
Catalyst Deterioration Level (Heated Oxygen Sensor Locus Length Ratio)
0.3 Or More
Number Of Times Detection
2 times