If the operator applied the emergency brakes with the truck in motion it will cause and 88 or a 92 code. If the code shows only in the key on position it's historical if the code is on with the engine running its active. The sudden loss of pressure at the park brake is the cause
Please provide model and serial number for more accurate information.

Copied from error list
F-92 Parking brake burning warning 1.Connector contact bad 1.Connector connection check
2.Harness bad 2.Harness connection check
3.Parking brake switch bad 3.Switch connection check
4.Controller bad