F 250 4WD Super Duty V8-6.4L DSL Turbo (2008)
Malfunction Indicator Lamp: Description and Operation
MALFUNCTION INDICATOR LAMP (MIL)
Malfunction Indicator Lamp (MIL)
The MIL informs the driver that the powertrain control module (PCM) has detected an on-board diagnostics (OBD) emission-related component or
system concern.
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The MIL is located in the instrument cluster.
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The indicator is illuminated by a PCM message sent through the controller area network (CAN) to the instrument cluster.
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An engine or transmission with federal calibration operating in the failure mode effects management (FMEM) may cause the MIL to illuminate.
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To turn off the MIL after a repair, a clear DTCs command from the scan tool must be sent to the PCM.
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For any MIL concern, go to Symptom Charts, PCM Quick Test. See: Testing and Inspection/Symptom Related Diagnostic Procedures/Symptom
Charts/QT: Powertrain Control Module (PCM) Quick Test
