You need to download the update. It will show engine temps after you update your Mychron 5.
I believe he bought this one right when they were first available. He said that feature has never worked. I'll tell him to get it updated. Thanks!Your M5 must have an older firmware so it just needs to be updated and that feature will be available. If you need help or have any questions give us a call at 800-718-9090 and we can help.
MyChron Mike