O2

is there a question here? like what may cause malfunction of the 02? Where on earth are the 02's located? why do we need to be checkin' for oxygen anyways?, it's all around us~

Oxygen gas normally is the divalent molecule O2. Ozone, O3, is another form of pure oxygen. Oxygen supports combustion. Oxygen is paramagnetic. Approximately 2/3 of the mass of the human body is oxygen. Excited oxygen is responsible for the bright red and yellow-green colors of the aurora. Oxygen was the atomic weight standard for the other elements until 1961 when it was replaced by carbon 12.

manifold mounted and after the cat and sometimes before the cat = 3 on some crazy vehicles~