So I noticed my car overheating the other day while at idle. Coolant is topped off. The car ONLY does it while sitting at idle. Is this a bad thermostat switch? Has anyone ever dealt with this code? Not sure where to start looking with this one.

So does the fan start to run when starting to overheat at idle? If not, it's either a fan or switch problem. Which model do you have? This would help in suggesting a trouble-shooting sequence.

See if both fans operate with the A/C on.