Tire Pressure Monitoring Systems
The tire industry first in Europe and more recently in the United Sates have introduced an electronic tire pressure monitoring system (TPMS) designed to monitor the air pressure in tires. TPMS either via a gauge, a pictogram display, or a simple low-pressure warning light warn the drivers when tire pressure in low. TPMS are provided both at an OEM (factory) level as well as an aftermarket solution.
Tire pressure monitoring systems continuously monitor the pressure in the tires through sensors located in the tires (direct system) or the use of wheel speed and other vehicle sensors (indirect system). The information collected by the sensors is transmitted to an on-board processor that interprets the sensor signals and warns the driver when tire pressure is below the minimum acceptable level by illuminating a warning lamp.
TPMS warning lamp on the instrument panel illuminates while driving, it means that the system has detected at least one tire with a pressure below the accepted minimum psi for the vehicle. The tires should be inspected. The lamp will extinguish after the tires are properly inflated.
On cold mornings, the warning lamp may illuminate for a short period of time and then extinguish. This type of warning lamp response is likely caused by marginally low tire pressure that dips below the warning threshold over-night but rises to an acceptable level as the tires heat up through vehicle operation or an increase in ambient temperature. The tires should be inspected and the tire pressure should be checked. The lamp should not illuminate when the tires are properly inflated.
TPMS warning icon may also light up due to malfunction from : sensor batteries can become discharged and fail, installing the incorrect valve core (TPMS sensors require a special nickel-plated valve core), tire changing procedures can damage a TPMS sensor;
pulling a stem out of the wheel will lead to a broken sensor, over tightening a new sensor valve will result in a broke and road hazards – collisions, potholes, curbs – can damage the TPMS system. In all cases when the icon appears have your vehicle serviced.