Using a rapid negative (dump) or positive change in air pressure (typically minimum +/- 2 PSI required) to trigger a TPMS sensor radio frequency (RF) transmission. For some sensor/vehicle combinations, this can be an alternative to using a TPMS scan tool LF trigger or magnet trigger during a vehicle relearn. Be sure to never exceed the maximum pressure on the tire sidewall, that the vehicle weight is supported by a lift so as to not cause tire damage and promptly adjust all tire pressures back to placard pressure following the vehicle relearn.

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