If you are speaking of the orange light with the outline of the engine - - It is associated with the engine emissions control system. It most commonly lights up when the gasoline filler cap has been left loose (or replaced with the wrong cap) - or the PCV valve needs replacing. After checking or replacing those two items - steady driving of about 1/2 hour or more should re-set the light. If not, you need to see a mechanic for other possible problems.
The 2001 Ford Focus has an inline 4 engine.
Thousands of things. Take it to a mechanic who has a scanner and they can tell you what the problem is.
Check your gas cap.....My check Engine light always comes on if it is loose or not on at all.
The 2001 Ford Focus has a 2.0 L base engine size.
The 2001 Ford Focus's engine produces 130 hp @ 5300 rpm.
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. .
The 2001 Ford Focus's engine produces 135 ft-lbs. @ 4500 rpm.
There are pages and pages and items that can cause a check engine light. You need to have it checked for codes with a scan tool. After repair light can be shut off with scan tool.
On a 2001 Ford Focus : The thread on cap on your engine coolant reservoir is the pressure cap / radiator cap
Fixing the problem which causes it would be the first step.
In a 2001 Ford Focus : The 2.0 liter SPI engine and the 2.0 liter Zetec engine use a timing BELT
How do you turn off the check engine light on a 2001 honda accord?