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Home >> Ford >> 2004 >> Econoline E250, Van Cargo Extended, 5.4 L >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Cluster- Conventional >> Diagnosis And Testing >> Principles of Operation >> Service Engine Soon Warning Indicator

Service Engine Soon Warning Indicator

When there is a fault in the engine control system, the PCM sends a message via the SCP network to the instrument cluster, causing the service engine soon warning indicator to illuminate.

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