GM Service Manual Online
For 1990-2009 cars only

System

DTCs Required to Set System Status to YES

Catalyst

DTC P0420

EGR

DTC P0401

DTC P0404

DTC P0405

DTC P1404

EVAP

DTC P0440

DTC P0442

DTC P0446

DTC P1441

Oxygen Sensor

DTC P0133

DTC P0140

DTC P1133

DTC P1134

Oxygen Sensor Heater

DTC P0135

DTC P0141