P2001
NOx Trap Efficiency Below Threshold Bank 2
2018-2025 Fiat Cronos 1.3L I4 Flex Firefly
High SeverityPowertrainGeneric (SAE)
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
Fiat 124 Spider
2017-2020 1.4L I4 Turbo
Fiat 126p Maluch
1973-2000 0.65L I2 Air-Cooled
Fiat 126p Maluch
1987-2000 0.7L I2 Air-Cooled
Fiat 500
2012-2019 1.4L I4
Fiat 500 Abarth
2012-2019 1.4L I4 Turbo
Fiat 500 BR
2011-2020 1.4L I4 Flex Fire Evo
Fiat 500 PL
2007-2025 1.2L I4 Fire 69
Fiat 500L
2014-2020 1.4L I4 Turbo
Common Questions
What does code P2001 mean on a 2018-2025 Fiat Cronos?
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 Fiat Cronos?
Common symptoms of P2001 include: Check engine light, Failed emissions, Slight power loss.
What causes P2001 on a 2018-2025 Fiat Cronos?
Common causes of P2001 include: Degraded NOx trap bank 2, Sulfur poisoning, Exhaust leak, NOx sensor fault.