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On-Board System Readiness (OSR) Test : Description

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

All on board diagnostic (OBD) scan tools display the OSR test. The OSR displays the supported monitors on the vehicle and the status of all monitors (complete or not complete) at that time. Fuel, misfire, and comprehensive component monitors run continuously and always display YES status. Only clearing the diagnostic trouble codes (DTCs) from the powertrain control module (PCM) or resetting the keep alive memory (KAM) causes the non-continuous monitors to change to a NO status. The transaxle control module (TCM) does not display any OSR test results.

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