NOx Trap Efficiency Below Threshold Bank 1
1990-2002 Mercedes-Benz SL 3.0L I6
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
Mercedes-Benz 500SL R129
1990-2002 5.0L V8 M119
Mercedes-Benz 600SL R129
1993-2002 6.0L V12 M120
Mercedes-Benz A220 W177
2019-2024 2.0L I4 Turbo M260
Mercedes-Benz A250 W176
2013-2018 2.0L I4 Turbo M270
Mercedes-Benz A35 AMG W177
2020-2024 2.0L I4 Turbo M260
Mercedes-Benz A45 AMG W176
2014-2018 2.0L I4 Turbo M133
Mercedes-Benz A45 AMG W177
2020-2024 2.0L I4 Turbo M139
Mercedes-Benz AMG GT
2015-2024 4.0L Turbo V8
Common Questions
What does code P2000 mean on a 1990-2002 Mercedes-Benz SL?
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 Mercedes-Benz SL?
Common symptoms of P2000 include: Check engine light, Failed emissions test, Reduced fuel economy.
What causes P2000 on a 1990-2002 Mercedes-Benz SL?
Common causes of P2000 include: Degraded NOx trap, Sulfur contamination, Exhaust leak before sensor, Faulty NOx sensor.