NOx Trap Efficiency Below Threshold Bank 2
2020-2020 Audi R8 5.2L V10 (Gen 1, 525hp)
The 2020 Audi R8 is equipped with a 5.2L V10 engine. Below you'll find detailed p2001 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
The NOx storage catalytic converter on bank 2 is not efficiently reducing nitrogen oxides.
Symptoms
- Check engine light
- Failed emissions
- Slight power loss
Common Causes
- Degraded NOx trap bank 2
- Sulfur poisoning
- Exhaust leak
- NOx sensor fault
Diagnostic Steps
- Check NOx sensor output bank 2
- Compare to bank 1
- Inspect exhaust for leaks
Repair Notes
Replace NOx trap bank 2 if regeneration fails.
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
P2001 on Other Vehicles
Common Questions
What does code P2001 mean on a 2020-2020 Audi R8?
P2001 stands for "NOx Trap Efficiency Below Threshold Bank 2". The NOx storage catalytic converter on bank 2 is not efficiently reducing nitrogen oxides.
What are the symptoms of P2001 on a Audi R8?
Common symptoms of P2001 include: Check engine light, Failed emissions, Slight power loss.
What causes P2001 on a 2020-2020 Audi R8?
Common causes of P2001 include: Degraded NOx trap bank 2, Sulfur poisoning, Exhaust leak, NOx sensor fault.
Last updated: March 2026