GM Service Manual Online
For 1990-2009 cars only

System

DTCs Required to Set System Status to YES

Inspection/Maintenance (I/M) System Set Procedure

Catalyst

DTC P0420

Inspection/Maintenance (I/M) Catalyst System Set Procedure

EVAP

DTC P0442

DTC P0446

DTC P0455

DTC P0496

Inspection/Maintenance Evaporative Emission System Set

Oxygen Sensor

DTC P0133

DTC P0136

DTC P0140

DTC P1133

Inspection/Maintenance Heated Oxygen Sensor/Oxygen Sensor System Set

Oxygen Sensor Heater

DTC P0135

DTC P0141

Inspection/Maintenance Heated Oxygen Sensor Heater System Set