Other than the fan not working what will cause the fan 2 overheat?

Diagnostic trouble codes (DTC's) that can be stored in the engine's processor memory indicate something that occurred that needs to be tested further. "Fan 2" is indicating a concern with a cooling fan. But it doesn't condemn the fan as failed, it merely shares that there was something seen this is abnormal, requiring testing to be performed. It's possible the fan motor is unresponsive, but testing is needed to see what is happening. www.repairpal.com/repair-shops