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 a parts store 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.
ford
The check engine light comes on when the computer has detected a problem with the emissions system. The engine maintenance light comes on when the engine needs some scheduled maintenance such as an oil/filter change.
It is in direct relation to how far you are from a gas station and / or mechanic. And when you do see a mechanic it will turn off. .
If you are referring to the Check Engine light it is on because the computer has set a fault code due to a problem with the emissions system.
The 2006 Ford Focus has 16 valves.
The 2006 Ford Focus is a gas-powered vehicle.
The 2006 Ford Focus has an inline 4 engine.
The 2006 Ford Focus has a 5-speed manual.
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The height of the 2006 Ford Focus is 4 ft. 8.8 in. (56.8 in.).
The 2006 Ford Focus has double overhead cam (DOHC).
The 2006 Ford Focus's turning circle is 34.2 ft..