Question about 2003 Ford Expedition

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I have a 2003 ford expidition and the check engine soon light came on. what does this mean?

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There are many reasons for the light to come on. anything from emissions to firing problems. You can take the vehicle to Auto Zone or other parts stores and they will read the code for you for free.

Posted on Jul 12, 2010

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Most likely that you need an O2 Sensor however, take the vehicle to one of the local Auto Parts stores and ask them to connect a code reader to the vehicle and they can tell you what the code is and what it means.

Posted on Jul 12, 2010

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What does the service engine light mean on a 2015 Ford Edge


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If the Service Engine Soon indicator light stays lit after you've started the engine, the On Board Diagnostics system (OBD) has detected a malfunction of the vehicle emissions control system. Contact your authorized dealer as soon as possible.
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I checked the manual for 'CHECK ENGINE ZONE' and could find no reference to this for the 2003 Expedition.

There is a Service Engine Soon light though.

I looked all over the manual and could find no instrument cluster light to that effect.

Can you tell me what page refers to this?

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