P22A0 Code Definition
P22A0 NOx Sensor Circuit Low (Bank 1 Sensor 2)
What Does the Engine Code P22A0 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. "2" 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 "A0" is DTC number. OBD2 Diagnostic Trouble Code P22A0 means that NOx Sensor Circuit Low (Bank 1 Sensor 2) has been detected.
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How Serious Is the Code P22A0?
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.