Monitored Emission Control Systems
WARNING: This page is about a different car, the 2003 Pontiac Sunfire, 2003 Pontiac Grand Am, 2003 Oldsmobile Alero, and 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
The OBD-II System monitors all emission control systems that are on-board. Not all vehicles have a full complement of emission control systems. For example, a vehicle may not be equipped with secondary Air Injection (AIR) or Exhaust Gas Recirculation (EGR). The OBD-II regulations require monitoring of the following:
- Air conditioning system.
- Catalytic converter efficiency.
- Comprehensive component monitoring. Emission related inputs and outputs.
- Evaporative (EVAP) emissions system.
- Exhaust Gas Recirculation (EGR) system.
- Fuel delivery system.
- Heated catalyst monitoring.
- Misfire monitoring.
- Oxygen Sensor (O2S or HO2S) system.
- Oxygen Sensor Heater (HO2S heater) system.
- Secondary Air Injection (AIR) system.
For specific monitor information, see SELF-DIAGNOSTICS - 2.2L ALERO, CAVALIER, GRAND AM & SUNFIRE - GASOLINE article.