Hi, this is Bo, an auto expert on RepairPal's Car Genius team!
An "OTM Test Malfunction" detected on your F-150 suggests a fault during the "On-Board Monitoring" test, possibly related to emissions or other system diagnostics. This could be a minor glitch or an indication of a component needing inspection, like the O2 sensors, EVAP system, or related emissions controls. Running a full scan for related codes might give a more specific clue, or a trusted repair shop can help pinpoint it.
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