there are a good amount of things it cant read like wideband O2 reading, like it can tell you how many volts the sensor is sending back to the computer but it doesnt translate that to a air/ratio, i live in louisiana so the coldest my coolests been that ive seen is like 50 degrees, i do find the app for accurate then the cluster, for an example, there is a feature that shows how fast the VSS says your going, then there is one that shows how fast the GPS says your going and it tells you the differnce, MAF and MAP sensors are fully functional, the MAF sensor is cool becasue it tells you how much cfm is passing by it, which at WOT is 1300+ cfm, im suprised but the fuel gauge doesnt work, youd think thatd be an easy sensor to work but not really, i like the powertrain feastures, like it estimates your hp and torque, also it can do 0-60, 0-100, 1/4 mile times, ect, which is fun to screw with