P2104 Code Definition
P2104 Throttle Actuator Control System - Forced Idle
What Does the Engine Code P2104 Mean?
Character "P" in the first position of Diagnostic Trouble Code (DTC) represents the powertrain system (engine and transmission), "2" in the second position means that this is a ISO/SAE controlled OBD-II (OBD2) DTC. "1" in the third character position in a DTC indicates that the fuel and air metering and auxiliary emission controls is experiencing a malfunction. The last two characters "04" is DTC number. OBD2 Diagnostic Trouble Code P2104 means that Throttle Actuator Control System has been detected.
Carly Universal Scanner
How Serious Is the Code P2104?
For now, this issue is not serious. Carly recommends you to check this issue on a regular basis and check if it gets worse later on.