Monitored Emission Control Systems
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 Exhaust Gas Recirculation (EGR). The OBD II regulations require monitoring of the following::
- Comprehensive component monitoring -- Emission related inputs and outputs.
- Exhaust gas recirculation (EGR) system.
- Misfire monitoring.
INSPECTION/MAINTENANCE SYSTEM DTCS
| System | DTCs Required To Set System Status To YES | |
|---|---|---|
| Component Monitoring | P0236, P0741, P0742 | |
| Exhaust Gas Recirculation (EGR) | P0101, P0401, P0404, P2279 | |
| Misfire Monitoring | P0300, P0301-P0308 | |