P2001 Lexus Oxides of Nitrogen Trap Efficiency Below Threshold Bank 2
Possible causes
– Sensor or solenoid faulty
– Connector terminal contact is damaged or corroded
– Wire harness – Check harness for correct voltage, open, short to ground or short to voltage
– Update control unit software – Check for the latest control unit update
– Powertrain or Engine Control Module faulty
– Catalytic converter damage
– Catalytic converter improper operation
– Connector terminal contact is damaged or corroded
– Wire harness – Check harness for correct voltage, open, short to ground or short to voltage
– Update control unit software – Check for the latest control unit update
– Powertrain or Engine Control Module faulty
– Catalytic converter damage
– Catalytic converter improper operation
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
Lexus Vehicle:Lexus ES,Lexus GS,Lexus GX,Lexus HS,Lexus IS,Lexus LFA,Lexus LS,Lexus LX,Lexus RX,Lexus RX,Lexus SC,Lexus GS350,Lexus GS450H,Lexus IS250,Lexus GX460,Lexus IS350,Lexus LS460,Lexus LS600H,Lexus LX570,Lexus RX350