If you've had tires changed, rotated, or inflated, the system will generally recalibrate itself after driving for a short distance (a few miles) at moderate speeds. The low tire pressure warning light should go out automatically if the tires are properly inflated.
However, if the light remains on after driving, consider these possibilities and actions:
* Proper Inflation: Make absolutely certain all your tires are inflated to the correct pressure as specified on the sticker located inside the driver's side doorjamb. Use a reliable tire pressure gauge, not just the gas station air compressor's gauge.
* Sensor Issues (Indirect TPMS): While not a "reset," a faulty ABS sensor could trigger the warning light. This requires professional diagnosis and repair at a mechanic or tire shop.
* Other Issues: Occasionally, other electrical problems can cause the warning light to illuminate. A mechanic can help diagnose this if the tire pressure is correct.
In short: There's no reset button. Correct tire inflation is the primary step. If the light persists, see a mechanic. They'll be able to diagnose the problem accurately. Don't attempt to "reset" something that might have a mechanical or electrical fault.