Limp mode is when the car only uses 2nd gear and will not exceed something like 50 mph, it will use no other except reverse. If the car changes gear then it is not in Limp Mode.
The car will be very sluggish. As mentioned it could be the Intercooler pump but that would not be a problem from initial start but appear after a few miles, in this case the supercharger air would become too hot and the supercharger would be cut off from working.
You know how to get it out of the park position, this is caused by a cable going from the gear shifter too the ignition switch becoming broken or unadjusted.
In my signature there is a link to ‘Index to Crossfire problems....” in red. You can find the Service Manual and a lot of info on the car, you should look there.
Get a scanner and read of sny codes have been set.