Technical Definition:

Nitrogen Oxides (NOx) Trap Efficiency Below Threshold (Bank 2)

Trouble Code: P2001
Address: 0x2001
System: Powertrain
Subsystem: Fuel & Air metering, Auxiliary emission controls
Technical Description:

Possible Causes:

Possible Symptoms:

Oxides of Nitrogen Trap Efficiency Below Threshold Bank 2

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– 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

Specific Makes:

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