If you have market wheels and you didn't have your TPMS transferred then your TPMS will go off after 40 miles of driving. It's a rule of thumb to check your tire pressure before driving. A true measure is when the wheel/tire are cold.

i drove maybe 200ft across the road from my work to gas station to check tires pressure i dont think it will change that much for 200ft driving distance
and the temp. outside was about 35-40C

You're right, 200 ft. won't heat them up. Make sure you use a decent gauge, and use the same gauge all the time - the gas station gauges on the air pumps can't be trusted.

It's surprising how all the factors that influence tire pressure can add up. I've seen examples where guys set their pressures at 35 psi in July @ 80F, after they've been driving across town. Fast forward to 7:00am one morning in November @ 40F - the tires have lost 4 psi because they're now at ambient temp., 4 more because the ambient temp is 40F lower, a couple more because tires can easily bleed half a psi/month through the rubber. They're at 25 psi cold and they can't figure out why their TPMS is squawking at them, since no single tire looks lower than the others.

When I first got my aftermarket tires the light didn't come on. I had the rims on the car for about a year. About two weeks ago it came on for the first time and stayed on after I put air in them because the tires were low. I check the pressure when the tires was cold with a digital reader. I know it's at 35 psi. I'll just deal with it...doesn't bother me none.

i dont trust gas station gauges too
i allways use my own gauge(it is snap-on) which is about 6 month old and its preaty accurate +-0.25psi

My 04 tends to go on when it is very cold. For instance, last night I stayed in Gallup NM, and it supposedly got down to the single digits. The light came on for the first 30 miles or so in the morning until the tire sensors warmed up enough.

I've also had them go on when driving long distances in the summer with the temps around 100.

In both cases, the tires were around 30psi.

^Yup mine too. TPMS went on when it was 23 degrees. It was very cold that night. Very rare here in CA.

stupid light came back on again tooday in the morning
i went outside start my car up to let it warm it up cause it was 17Fin 10min
i jumped in the car and light was on..... checked tires pressure and it was 33psi
oh well going to the dealer on wednesday for bunch of other stuff and i guess its going to be one more thing for them to check it out