P2591 Code Definition
P2591 Cruise Control Front Distance Range Sensor (Left)
What Does the Engine Code P2591 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. "5" in the third character position in a DTC indicates that the vehicle speed, idle control and auxiliary inputs is experiencing a malfunction. The last two characters "91" is DTC number. OBD2 Diagnostic Trouble Code P2591 means that Cruise Control Front Distance Range Sensor (Left) has been detected.
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How Serious Is the Code P2591?
This issue is not critical yet. Make sure that it is current and fix it early before this leads to more severe issues.