OBD-II DTC · SAE J2012

P2001

NOx Trap Efficiency Below Threshold Bank2

AdBlue / SCR → Suppressible (off-road only)

What P2001 means

P2001 is a standard SAE J2012 powertrain diagnostic trouble code with the defined meaning: NOx Trap Efficiency Below Threshold Bank2. This is the OEM-agnostic definition; specific manufacturer interpretation may add detail (subsystem, bank, sensor location) but the core meaning is consistent across all OBD-II compliant vehicles since 1996.

Can this code be suppressed via ECU tuning?

Common service for export vehicles or off-road. Disables AdBlue dosing, level monitoring, and NOx sensor checks. NOT legal on EU road-registered cars (regulation 2018/858).

Related codes in the P20xx family

P2000P2002P2003P2004P2005P2006P2007P2008P2009P2010P2011P2012

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