This is a tire pressure reset tool designed to assist in the sensor relearn procedure. After each tire rotation, or when replacing tires, the body control module, or tire pressure sensors, the relearning process must be performed to ensure accurate tire pressure readings and proper display.Operation steps: 1. Ensure the vehicle is in TPMS learning mode. 2. Follow the vehicle manufacturers maintenance procedure. Position the tool near each tire (front left, front right, rear right, rear left), aligning it with the tire sidewall close to the valve stem, and press the reset button. 3. The green LED (TX light) will illuminate, indicating signal transmission. When the vehicle emits a chirp or horn sound, the matching is successful. 4. Repeat the process for the remaining tires.Specifications: - Compact and portable design - Real-time tire pressure monitoring capability - Diagnostic sensing function included - Compatible with most vehicles equipped with TPMS systems - For GM vehicles with 315 MHz or 433 MHz Tire Pressure Monitoring (TPM) systems, this tool supports the required "Sensor Relearn Procedure" after tire rotation, remote keyless entry receiver replacement, or sensor replacement - Suitable for use on 2012 and later models; compatible with procedures for 2014 GM vehicles - Note: Only specific diagnostic tools can retrieve sensor data on 2012 and newer modelsPackage Included: 1 x Tire Pressure Reset Tool