Originally Posted by 2011 Nismo#91

If it's reading 90s right at start up when everything is in the 60s then there is a problem. But if it's rises to the 90s after startup then thats normal. Idle in the garage does not move a lot of air so the air has plenty of time to heat up to the temp of your engine bay. For me it's normal for the air temp to get into the 90s or higher while sitting in traffic but as soon as I get to highway speeds to IAT gets to only a few degrees above ambient temps.