P2001

DTC P2001, sometimes indicated as P200100 is an OBD diagnostic trouble code indicating a manufacturer-specific fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the air/fuel mixture causing nox adsorber efficiency below threshold bank 2.

The NOx Adsorber Efficiency Below Threshold Bank 2 DTC is set when the NOx adsorber on bank 2 falls below a predetermined threshold. When this occurs, the engine will not be able to meet emissions standards and will likely fail an emissions test.
There are several possible causes of this DTC, including a leak in the NOx adsorber, a problem with the fuel system, or a problem with the engine control system.
The most common solution is to replace the NOx adsorber. If there is a problem with the fuel system or engine control system, that will need to be fixed as well.

• P2001: NOx Adsorber Efficiency Below Threshold Bank 2
• P2001: NOx Adsorber Efficiency Below Threshold
• P2001: Nitrogen oxides (NOx) trap, bank 2 – efficiency below threshold
• P2001 00: Nitrogen oxides (NOx) trap, bank 2 - efficiency below threshold