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.
The 2001 Ford Focus has a 2.0 L base engine size.
Check your gas cap.....My check Engine light always comes on if it is loose or not on at all.
Thousands of things. Take it to a mechanic who has a scanner and they can tell you what the problem is.
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.
On a 2001 Ford Focus : The thread on cap on your engine coolant reservoir is the pressure cap / radiator cap
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.
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
You need to buy spark plug leads with a surpresser built in to them