GM Service Manual Online
For 1990-2009 cars only

System

DTCs Required to Set System Status to YES

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 within the conditions are additional DTCs, which if set, may inhibit the DTCs listed below 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 or P0430

EVAP

DTC P0442

DTC P0446

DTC P0455

DTC P0496

Oxygen Sensor

DTC P0131 or P0151

DTC P0132 or P0152

DTC P0133 or P0153

DTC P0137, P0138, P0140, P0157, P0158, or P0160

DTC P2096 or P2098

DTC P2097 or P2099

DTC P2231 or P2234

DTC P2232 or P2235

DTC P2270 or P2272

DTC P2271 or P2273

Oxygen Sensor Heater

DTC P0030, P0031, P0032, P0036, P0037, P0038, P0050, P0051, P0052, P0056, P0057, or P0058

DTC P0135, P0141, P0155, or P0161