TSB: Some 2015 ? 2016 model year NX 200t vehicles equipped with 8AR-FTS engines may exhibit a MIL ?ON? condition Diagnostic Trouble Code (DTC) P023400 (Turbocharger/Supercharger ?A? Overboost Condition). The Engine Control Module/ECM (SAE Term: Powertrain Control Module/PCM) logic has been modified to reduce the possibility of this condition occurring. Follow the Repair Procedure in this bulletin to address this condition.