DAVID GALLANT
1 Answer
Colleen
P2001 - Oxides of Nitrogen Trap Efficiency Below Threshold Bank 2
- 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
http://engine-codes.com/p2001.html
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