SC Way

So has anybody confirm of the location of the TPIS receivers have to be in the right location? I just got 2 tires replaced and work fine for 5 months. Last week the low pressure warning light came up and can not figure out why. Brought it back to Discount Tires and they used some kind of tool without unmounting the tires to check. They said nothing wrong that they can fix. It may have to be reset by the dealer. Don't want to pay an arm and a leg for something like this. By the way, my is the 2006 model.