The check engine light (service engine soon) comes on and stays on when a problem is detected by the self diagnosis system of your vehicle. Generally, the problem is in the emissions or something that is affecting the effectiveness of the emissions, but other causes can trigger the light to come on, too. To determine the cause, the vehicle will need to be taken to AutoZone or a shop that has an OBD2 scanner, or for 1995 and earlier models, an OBD1 scanner, While a scanner will not give you the magic answer, it will give you a code that narrows down the problem area.
On a 2002 Ford Expedition : The " check engine " light is the " SERVICE ENGINE SOON " light just to the left of the fuel gauge
get the engine serviced.
NO, the service engine light means that a scheduled service is due. Usuallly this means an oil/filter change. However if the Check Engine light is on this can be serious, and means there is a problem with the emissions controls.
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
Have vehicle scanned to determine the problem See the related link for an explanation.
how do I reset my service engine light on my 1999 ford f150
Check engine light is out
The 2007 Ford Expedition has a V8 engine.
The 2009 Ford Expedition has a V8 engine.
The 2008 Ford Expedition has a V8 engine.
The 2002 Ford Expedition has a V8 engine.
The 2010 Ford Expedition has a V8 engine.