03 ford focus SPI single headcam. The temp. Gauge does not stay mid of the gauge?

It is always little bit closer to cold side than warm side even after driving 40 miles. No engine light is on. Any idea?

As long as it is not flopping around, all is good. The gauge or sender or both could be off a little. There's NOTHING that says the pointer has to be straight up. You don't always run with the speedometer pointer pointing straight up.

As long as the gauge is making it into the "Normal" band on the gauge, you're fine. On my Mustang the temp gauge rarely makes it half way up on the gauge even in the middle of July. During winter it rarely makes it 25% up the gauge.

There's nothing wrong with your car