A little info on your jeep would help a lot, maybe fill out your sig.
Is this on a newer jeep. Im not sure if the warning triggers for eng oil temp but I know you will see it for trans temp. Were you doing a lot of slow speed climbing or something. Things like that can get the trans temps up pretty high and if possible use low range. low range not only puts the engine in a better range it can help the trans out especially on temps. If your type of driving is doing that a lot, you might look into a bigger trans cooler. Also could be mud/debris inhibiting air flow through the cooler or radiator. Before you jump to conclusions though, you might consider a taking it to the dealer if still under warranty, it could be a glitch in the computer or program or some type of problem needing to be adressed under warranty.