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display will indicate YES in the Completed column. For example, when the HO2S Heater Status indicates YES, either all of the oxygen sensor heater tests have z The vehicle is new from the factory and has not yet been driven through the necessary drive conditions to z The battery has been disconnected or discharged below operating voltage. z The control module power or ground has been interrupted. z The control module has been reprogrammed. z The control module DTCs have been cleared. Monitored Emission Control Systems The OBD II System monitors all emission control systems that are on-board. Not all vehicles have a full z The air conditioning system z The catalytic converter efficiency z Comprehensive component monitoring-Emission related inputs and outputs z The evaporative emissions (EVAP) system z The EGR System z The fuel delivery system z Heated catalyst monitoring z Misfire monitoring z The oxygen sensor system (O2S or HO2S) z The oxygen sensor heater system (HO2S heater) z The AIR system For the specific DTCs required for each system, refer to Inspection/Maintenance (I/M) System DTC Table . Inspection/Maintenance (I/M) System Check Step Action Value (s) Yes No 1. Perform Diagnostic System Check - Engine Controls .
2004 Hummer H2 2004 ENGINE PERFORMANCE Engine Controls (Troubleshooting) - 4.8L, 5.3L, and 6.0L - Hummer H2
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