Since both tank gauges are reading 115 and the warning horn is off, I'd agree with Seth and 'guess' the Low-Air light sensor is bad (but then I haven't stayed at a Holiday Inn Express lately).
But something that definitely needs to be looked-at, just to make sure (if nothing else than to have the sensor replaced).
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'06 HR Endeavor 40PAQ (Mission Hills decor). All options, but still finding more to add.