^^^This Scotty actually posted this from the .bin file for 05' for me, when no one believed that the fans on 04+ don't come on until 217 for low. This causes the temp to get to about 221-222 until it starts to drop to about 210 then it does it all over again. I posted graphs of the oscillation while sitting in traffic. It's normal don't worry about it. If you want change your fan settings, with a tune.
Jeff