2013 Jeep Engine Light. A Jeep Wrangler Sport comes with a Power Train Control Module (PCM) computer on board that diagnoses problems throughout the vehicle. My check engine light illuminated and the engine was running rough, possible loss of power.

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Jeep Wrangler Service Light Interval Oil Life Reset Guide - YouTube (Minerva Hudson)
However, just because the check engine light is on, doesn't mean there's anything seriously wrong with it. Blinking Check Engine Light Diagnosis: Jeep Wrangler. When the engine warning light illuminates on the instrument panel, this is the result of a trouble code sent to the PCM.

Has anyone run a diagnostic test to pull the trouble code?

When the correct engine operating temperature is reached, the powertrain control module orders the fuel system to enter "closed loop.

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In some cases you need to pull over immediately to prevent damage while in others you merely need to tighten you gas cap next time you stop in order to reset the service engine soon light. Follow scan tool manufacturer's operating instructions to access the Diagnostic Trouble. Check engine light -- click for more: Sway bar fault.