Recently a customer brought in their 2010 Lexus GX 460 because the Tire Pressure Monitoring System (TPMS) light was on. The customer had checked each tire with a gauge and found that every tire was determined to be at the correct pressure. The BA auto mechanic who worked on this case was Jon. He checked all the tires with our tire pressure scan tool out and confirmed that in fact, all the sensors were transmitting a signal. This is important because if one of the tires isn't transmitting a signal, that would be a reason for the TPMS warning light to come on.