GM Service Manual Online
For 1990-2009 cars only

System

DTCs Required to Set System Status to YES

Catalyst Monitor

If an I/M System Status indicator did NOT update to YES during the Inspection/Maintenance (I/M) System Check , review each indicator and reference this table to determine each DTC associated with the I/M System Status Indicator. Each DTC listed below has specific conditions that must be met for the diagnostic to run. Included in these conditions are additional DTCs which, if set, will inhibit these DTCs from running. Reviewing and operating the vehicle within the Conditions for Running for each DTC listed below will allow the I/M System Status Indicators to transition to YES.

Catalyst

DTC P0420

EVAP

DTC P0442

DTC P0443, P0449, P0458, P0459, P0498, or P0499

DTC P0446

DTC P0451, P0452, or P0453

DTC P0455

DTC P0496

Oxygen Sensor

DTC P0130, P0131, P0132, P0133, P2195, P2196, P2231, or P2297

DTC P0137, P0138, P0139, P0140, P2232, P2270, or P2271

Oxygen Sensor Heater

DTC P0030, P0031, P0032, P0053, or P0135

DTC P0033, P0034, or P0035

DTC P0036, P0037, P0038, or P0141