This is a tire pressure reset tool designed to assist in the sensor relearn procedure. After tire rotation, replacement of tires, body control module, or tire pressure sensors, the relearn process must be performed to ensure accurate tire pressure value acquisition and display. Operation steps: 1. Ensure the vehicle is in TPMS learning state/mode. 2. Following the vehicle manufacturer’s maintenance procedure, position the tool near each tire in sequence (front left, front right, rear right, rear left), aligning it with the tire sidewall close to the valve stem (the air filling inlet), then press the reset button. 3. The green LED (TX light) will illuminate, indicating signal transmission. When the vehicle horn beeps, the matching process is successful. 4. Repeat the process for the remaining tires. Specifications: - Compact and portable design - Real-time tire pressure monitoring capability - Diagnostic sensing function - Compatible with most vehicles equipped with TPMS - For GM vehicles with 315 MHz or 433 MHz Tire Pressure Monitoring (TPM) systems, the sensor relearn procedure is required after tire rotation, remote keyless entry receiver module replacement, or tire pressure sensor replacement - Relearn procedure compatible with 2012 and later models; special tool EL-50448 may be used for GM vehicles, including 2014 models - Note: Only designated diagnostic tools can read tire pressure sensor data on 2012 and newer models Package Included: 1 x Tire Pressure Reset Tool