P1640 2011 FORD FUSION - Powertrain DTCs Available in Another Module
- Diagnostic Trouble Code (DTC) stored in a secondary module, which requested the MIL to be turned on.
- Engine Light ON (or Service Engine Soon Warning Light)
P1640 2011 Ford Fusion DescriptionVehicles using a secondary Engine Control Module can request that the Powertrain Control Module (PCM) illuminate the Malfunction Indicator Lamp (MIL) when a failure occurs which affects emissions.
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