In the last 2 days during freeway driving the coolant temp on the gauge has been creeping up. Typically it's dead center on the gauge. About 3-4 months ago replaced the temp. sensor and the wire with a new boot insulator. Coolant was still reading in the middle . Now I know the temp gauge is garbage and doesn't work great. The last couple of days I have checked the temp with a IR thermometer at the thermostat it was 192, Top radiator hose 190, at the temp sensor it was like 230. Not sure if its supposed to be that high. It does not get hotter then normal around town only free way.