The tire pressure monitoring system (TPMS) on the 2008-10 Honda Civic consists of four tire pressure sensors, a TPMS control unit, a low tire pressure indicator, a message indicator (Insight) and a TPMS indicator. The TPMS control unit monitors all four tires, the system, and alerts the driver if there is a large change in the tire pressure or a system problem by illuminating the appropriate indicator.