tire sensor light on after tire rotation

[DJE624]

I checked my spare today.  It was at 40psi.  I pumped it up to 60.  The warning still came on.  Maybe it will go off when I have the car running longer.  I wanted to disconnect the battery but, my sockets are buried and I will have to dig them out tomorrow. 

I think I heard somewhere that the notification is supposed to come on if a tire becomes less than 80% of spec. 

[EcoBrick Bob]

When I lowered my front's to drag race, the TPMS light came on immediately..  Went  off immediately when I pumped them up!

[akhowell]

ok final update got back home over the weekend and checked the tires with my good guage and found the tires were indeed low not bad except for one was 5-6 low. aired all up to 35 and no more problem. asked wife what guage she used (thinking she had used mine) and she used one of those gas station ones (crap). so all is good no more problems

[DJE624]

Cool!  So one was about 15-20% low.  My dang light is still on.  It's been off and on since I bought it in May.  I thought dropping them down at the track and filling them back up might do it.  Didn't.

[SHOdded]

Maybe overinflating the tires by 5-6 psi one by one (just to see if the TPMS quiets down) might work, Dave?  Assuming it is a sensitivity related problem and not an outright defect.  You know for a fact that all 4/5 sensors are the same type?

[DJE624]

When I refilled at the track, I pumped them up to 40 then brought them back down to 36.  They should all be original.  The car did a lot of sitting around for a year and a half (200 mi.).