low tire pressure light

[rjay]

Just bought a used 2005 explorer from a good dealer. Ist morning after buying I noticed a low tire pressure warning light. Stayed on for approx 10 miles then went out. This has re occured every morning since (Approx 4 days).. It is cold in the mornings about 15-20 degrees. Is this normal, should I add air to tires?

 

[hazmat456]

tires will heat up and the pressure increases so your prolly a couple of pounds low due to the cold