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The sensors only transmit when interrogated by the onboard car system via the transceiver which is only activated once the ignition is switched on.
When the vehicle is moving, the valves transmit their status every minute if no leak is present and
every 10 seconds if a leak is present - this only occurs when the vehicle is travelling over 12 mph.
When the vehicle is stationary, the valves issue this information every hour if no air leak is present and every
15 minutes if an air leak is present.
In other words if there is a constant fault with the tyre the battery life could be reduced as it would be used more often.
Currently in madnoel10's garage:
Honda Civic 1.4l