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Service Engine Soon

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Light Emitting Diode (LED) is controlled by Vehicle Control Module/Powertrain Control Module (VCM/PCM). As a check, LED illuminates when key is turned to run. LED should turn off 1-5 seconds after engine starts. If a problem occurs in engine control system, PCM/VCM illuminates LED and a DTC may be stored. SERVICE ENGINE SOON light may be referred to as Malfunction Indicator Light (MIL).

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