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Message: <blockquote data-quote="Tonebalone" data-source="post: 27502" data-attributes="member: 8128">Go into service mode by pressing the start button for more than 5 seconds with foot off the brake.Scroll to the tire pressure display in the DIC. Press and hold the check mark in the center of the DIC control. The horn will honk twice. Starting with the driver front tire, place the relearn tool near the valve stem and press the button on the relearn tool. Repeat these steps at right front, right rear, and left rear tires. The horn will honk twice indicating the test is over. Turn off the car. FYI, this needs to be completed within two minutes.I used this method to identify which of my TPMS sensors had died a premature death. Please note that these instructions are for Gen 3 vehicles, but they might work for Gen 4.</blockquote>