The low tire pressure/TPMS indicator is on with VSA DTC C0077 or C0078 (low tire pressure threshold refinement). If the tires are inflated to the pressure listed on the doorjamb label, the vehicle has likely been driven up or down steady grades. The cause of the code and light is the TPMS software may not be properly adapted to driving up or down steady grades.
Update the VSA modulator-control unit and perform a VSA sensor neutral position memorization. Remember to set the pressures at the cold inflation levels during the calibration procedure.