P2A3D Code Definition
P2A3D O2 Sensor Negative Current Control Circuit High Bank 1 Sensor 3
What Does the Engine Code P2A3D 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. "A" in the third character position in a DTC indicates that the is experiencing a malfunction. The last two characters "3D" is DTC number. OBD2 Diagnostic Trouble Code P2A3D means that O2 Sensor Negative Current Control Circuit High Bank 1 Sensor 3 has been detected.
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How Serious Is the Code P2A3D?
This issue is not critical yet. Make sure that it is current and fix it early before this leads to more severe issues.