Of course you may change it whenever you wish and the change indicator will go away when you do the reset routine: turn ignition on, depress gas pedal to floor 3 times in 5 seconds, turn ignition off. Doing the reset routine will reset the indicator system even if the light did not illuminate before you did the oil change. This system uses pressure sensors that are located within the tyre to track the pressure. Because of their location, they can track the exact pressure within the tyre, making them accurate and reliable. When the pressure drops past a set parameter – usually 25% – a warning alert will appear on your dashboard. Press the reset button. The next step in the process is to press the located button for three seconds. Once the light blinks three times on the dashboard, this means the TPMS is reset. After this, turn off the engine and start it again after five seconds (from the time, the light blinks). This would resolve the issue. Press the MENU or SET button to select. RESET mode will appears on the display. Select YES to execute the TPMS reset. Use the – or + button to scroll the option and press the MENU or SET button to select. Select YES again to confirm. Done! These instructions are based on the Fiat Punto owner’s manual.

So if outside air temperature decreases 30° from your last tire pressure adjustment, expect tire pressure to drop about 3 psi. If temperatures get particularly arctic, the rate at which tires deflate can be greater than the 1 psi per 10° rule of thumb. The low psi warning light pictured above was triggered on a -11° morning after a ~55

If you have to inflate warm tyres, add 4 PSI (0.3 bars) to the recommended pressure. Whatever you do, avoid measuring tyre pressure in direct sunlight or when your vehicle has been parked in hot weather. To check the pressure, unscrew the cap covering the tyre valve, fit the nozzle of the pressure pump onto the valve and check the reading on 75Yc50.
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    • check tyre pressure level reset required fiat tipo