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Home >> Scion >> 2006 >> tC Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (2AZ-FE) >> SFI System >> DTC P0420 Catalyst System Efficiency Below Threshold (Bank 1) >> Typical Malfunction Thresholds
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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