If a battery is at the end of its life or if there is age-related wear and tear to the gaskets, seals, valve caps, or core of the sensor, it can malfunction.Īnother thing that can cause damage to the sensors is if a substance other than air or nitrogen is in the tire. Physical sensors are prone to damage and also have a lifespan of about 5-10 years due to the onboard battery in each sensor. 1) Malfunctioning TPMS Sensor (Direct Systems) If the tire pressure light is still on after you’ve driven for several minutes and made certain the tires are all at the correct pressure, one or more of the following may be the culprit. It’s important to figure out why the tire pressure light is still on before resetting it to avoid potential safety issues or vehicle damage. If, however, you drive for more than about ten minutes and the light is still on, the sensors may need to be reset or recalibrated. Some TPMS lights will turn off after a few miles, giving time for the ECU to figure out that everything is fine. Once you are certain that all tire pressures are set correctly, start the car again and continue on your way. Newer Nissan vehicles will beep the horn twice if the tires are being overfilled. Some vehicles have special signals to help you fill the tires correctly. Fill each tire to the pressure specified in the manual or the information panel on the inner door jamb. If you see this while you’re driving, pull over as soon as it is safe to do so, and check the tire pressure on all wheels. If a tire has low pressure, the dashboard TPMS light will illuminate. This indicator often looks like a tire viewed from the front with an exclamation point inside it. When the car starts, the TPMS light will normally illuminate for a second or two. The ECU analyzes it and sends a signal if one of the tires has low pressure, as it will rotate differently than the others. Indirect TPMS monitoring uses wheel speed sensors to give information about the rotation of the tires. Each quadrant has a physical tire sensor or transmitter, often attached to the inside part of the valve stem (where the air is supposed to go in and out of the tire). The direct system is used in the majority of cars. The tire pressure is measured independently for each wheel, and some cars will even tell you each individual tire pressure right from your instrument cluster. There are a couple of ways that the tire pressure is measured and sent to the ECU in order to signal the driver. 2) Faulty Wheel Speed Sensor, ABS, or ECU (Indirect Systems).1) Malfunctioning TPMS Sensor (Direct Systems).
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