Service Tire Pressure Monitor System.

The tire pressure monitor system in todays cars use a radio frequency (RF) transmitter ( Tire Pressure Sensor ) in each wheel valve stem to relay pressure information to the module. The Service Tire Pressure Monitor System light / warning means there is a problem in the system, not a low tire. The Low tire pressure warning would come on for a low tire.

The system would need to be scanned for codes if the
service monitor system warning comes on.

After a
tire rotation, the tire positions need to be relearned in order for the system to tell you which tire is low. A special procedure and tool is need to do this.
Tire Pressure Monitor Warning System

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