The check engine light 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.
With a scan tool.
I think it means you need to check your engine.
The 2006 Ford Explorer has a V6 engine.
The check engine light comes on when the engine computer detects a malfunction and sets a trouble code.
that is not a question
The wrench light in any car means your engine needs attention.
It requires an engine scanner to do that.
Bill Greene
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.
That REQUIRES an ENGINE SCANNER to do that.
The 2006 Ford Explorer has a 4.0 L base engine size.
Go to AutoZone and ask one of the fellas to come out and "check your check engine light code". They will be able to tell you what the problem code is, as well as re-set your check engine light.