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Start a tire-pressure check with your vehicle’s placard and a gauge. A warning light and the number moulded on the tire sidewall are not substitutes for the vehicle’s recommended cold pressure. Do not use a universal PSI value from a different car. This is a basic measurement and record-keeping guide, not a diagnosis of a damaged tire. If there is visible damage, a rapid loss of pressure or unusual handling, arrange professional help rather than relying on a reset. Contents 1. Find the vehicle recommendation 2. Measure under comparable conditions 3. Read the TPMS warning before clearing it 4. Keep a short service note 1. Find the vehicle recommendation NHTSA advises checking tire pressure monthly and using the vehicle manufacturer’s recommended pressure, found on the tire-information placard or in the owner’s manual. Its guidance distinguishes that recommendation from the pressure marking on the tire itself. Write down the front and rear recommendations separately if they differ. Also...