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Home >> Toyota >> 2004 >> Corolla LE, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (SFI) - Diagnostics >> DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1) >> Monitor Strategy
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Monitor Strategy

MONITOR STRATEGY TABLE

Related DTCs P0420 Bank 1 catalyst is deterioration
Required sensors/components Main sensors Front and rear heated oxygen sensor
Related sensors Mass air flow sensor, engine coolant temperature sensor, engine speed sensor, intake air temperature sensor
Frequency of operation Once per driving cycle
Duration 90 seconds
MIL operation 2 driving cycles
Sequence of operation None