*** September 7, 2019 - Updated my rating to 5 stars. I contacted Jayco in August and explained why the original block wasn't being read properly. They apologized and assured me a replacement would be sent. About a week later I received it. I immediately tried it on my Lexus ES300H. I compared it to the TPMS sensor and the reading matched exactly. Apparently the first sensor was just bad. However, Jayco did well and due to that and the characteristics of this sensor I changed my rating to 5 stars. ***** August 27, 2019 - Notice. I've updated my rating to 2 stars because I contacted Jayco Customer Service today (10:15am ET) and received a reply within minutes asking for my Revain order number and that I was sent a free replacement would. I will review this ad immediately and adjust my star rating accordingly. ** I finally tried it today. 9 days after the end of the return period. I wish I had tried that sooner. It's at least 10 psi, which means that if it measures 36 psi, there's actually 44 psi in the tires. I thought the TPMS readings might be wrong. I checked the tires with a digital pressure gauge. The tires were pumped up, of course. Adjusted, TPMS reset and it matched my digital gauge. I'm really mad at myself because this gauge has some great features that others don't have. Too bad it's not accurate.