GM Service Manual Online
For 1990-2009 cars only

System

DTCs Required to Set System Status to YES

Catalyst

DTC P0420

EVAP

DTC P043E or P043F

DTC P0441

DTC P0450, P0452, or P0453

DTC P0455 or P0456

DTC P2401 or P2402

DTC P2419 or P2420

HO2S/O2S

DTC P0136-P0138

DTC P2195 or P2196

DTC P2237-P2239

DTC P2252 or P2253

DTC P2A00

HO2S Heater

DTC P0031, P0032, P0037, or P0038