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Home >> Buick >> 2004 >> Century Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls 3.1L (Troubleshooting & Diagnosis) >> Engine Controls >> Inspection/Maintenance (I/M) System DTC Table

Inspection/Maintenance (I/M) System DTC Table

Inspection/Maintenance (I/M) System DTC Table

System DTCs Required to Set System Status to YES
Catalyst DTC P0420 Catalyst System Low Efficiency
EGR DTC P0401 Exhaust Gas Recirculation (EGR) Flow Insufficient
EVAP DTC P0442 Evaporative Emission (EVAP) System Small Leak Detected
DTC P0446 Evaporative Emission (EVAP) Vent System Performance
DTC P0455 Evaporative Emission (EVAP) System Large Leak Detected
DTC P0496 Evaporative Emission (EVAP) System Flow During Non-Purge
Oxygen Sensor DTC P0133 HO2S/O2S Slow Response Sensor 1
DTC P0140 HO2S Circuit Insufficient Activity Sensor 2
DTC P1133 HO2S Insufficient Switching Sensor 1
DTC P1134 HO2S Transition Time Ratio Sensor 1
DTC P0136 O2S Circuit Bank 1 Sensor 2
Oxygen Sensor Heater DTC P0135 HO2S Heater Performance Sensor 1
DTC P0141 HO2S Heater Performance Sensor 2