The lean NOx trap is not storing and converting NOx as it should. Common on Euro 5 and Euro 6 diesels with a lot of urban mileage.
P2000 — also written P2OOO, P 2000, 2000 — is the OBD-II code for nox trap efficiency below threshold (bank 1). Same code, same fix: this page covers every spelling of it.
P2000 is a emissions fault code, typically costing £150–£2200 to put right in a UK garage.
What causes P2000?
- Sulphated or aged NOx trap
- Faulty NOx sensor giving false readings
- Repeated failed regeneration cycles
- Underlying EGR or injector fault raising emissions
How P2000 is fixed
- Read NOx sensor live values before condemning the trap
- Attempt a forced desulphation regeneration
- Fix any EGR or injector fault first
- Replace the NOx trap as a last resort
P2000 repair cost in the UK
Most P2000 repairs land between £150–£2200 including parts and labour. The spread is wide because the cheap fix (a sensor, a hose, a leak) and the expensive fix (a major component) throw the same code — which is why a proper diagnosis before parts are bought saves the most money.
Can you drive with P2000?
Yes, usually with reduced power. It will fail an MOT with the light on.
Urgency: medium.