Mitsubishi TPMS Light On Due to Faulty TPMS Sensor

A faulty Tire Pressure Monitoring System (TPMS) sensor can trigger the warning light even if your tire pressures are correct. Each tire has a sensor that sends pressure data wirelessly to the vehicle's computer. If a sensor fails, its signal may be lost or incorrect.

To diagnose a faulty sensor:

• Professional Scan Tool: The most accurate way to check for a faulty sensor is by using a specialized TPMS scan tool. A professional mechanic can connect this tool to your vehicle's OBD-II port or directly scan each tire sensor to read its ID, pressure, temperature, and battery life.
• Visual Inspection: In some cases, a sensor might be physically damaged, especially during tire mounting or repair. While less common, a visual inspection during tire removal might reveal damage.
• Battery Life: TPMS sensors are battery-powered, and these batteries eventually die. A dead sensor battery will prevent the sensor from transmitting data, leading to a warning light. A scan tool can often detect a low or dead sensor battery.