On-Board System Readiness Test Mode: Description

All OBD-II scan tools should be able to display OSR test. The OSR will display monitors on the vehicle and status of all monitors; complete or not complete. If not complete, the scan tool will display which MONITOR & RECORD has not completed. Comprehensive component, fuel and misfire monitors run continuously and will always display YES. Only a PCM reset, or keep alive RAM reset will cause non-continuous monitors to reinitialize to display NO.