NOx Trap Efficiency Below Threshold Bank 1
2007-2012 Nissan Altima 2.5L I4 🇨🇦
Description
The NOx storage catalytic converter on bank 1 is not efficiently reducing nitrogen oxides.
Symptoms
- Check engine light
- Failed emissions test
- Reduced fuel economy
Common Causes
- Degraded NOx trap
- Sulfur contamination
- Exhaust leak before sensor
- Faulty NOx sensor
Diagnostic Steps
- Read freeze frame data
- Check NOx sensor readings upstream and downstream
- Inspect for exhaust leaks
- Perform desulfation procedure if applicable
Repair Notes
Replace NOx trap if desulfation fails. Check upstream components for causes of contamination.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P2000 on Other Vehicles
Nissan 200SX
1995-1998 1.6L I4 GA16DE
Nissan 200SX SE-R
1995-1998 2.0L I4 SR20DE
Nissan 240SX
1995-1998 2.4L I4 KA24DE
Nissan 300ZX
1990-1996 3.0L V6 VG30DE
Nissan 300ZX Twin Turbo
1990-1996 3.0L Twin-Turbo V6 VG30DETT
Nissan 350Z
2003-2006 3.5L V6 VQ35DE
Nissan 350Z
2007-2009 3.5L V6 VQ35HR
Nissan 370Z
2009-2020 3.7L V6 VQ37VHR
Common Questions
What does code P2000 mean on a 2007-2012 Nissan Altima?
P2000 stands for "NOx Trap Efficiency Below Threshold Bank 1". The NOx storage catalytic converter on bank 1 is not efficiently reducing nitrogen oxides.
What are the symptoms of P2000 on a Nissan Altima?
Common symptoms of P2000 include: Check engine light, Failed emissions test, Reduced fuel economy.
What causes P2000 on a 2007-2012 Nissan Altima?
Common causes of P2000 include: Degraded NOx trap, Sulfur contamination, Exhaust leak before sensor, Faulty NOx sensor.