The car has tried to regenerate its NOx trap and not finished the cycle, usually because journeys are too short or another fault is interrupting it.
P2005 — also written P2OO5, P 2005, 2005 — is the OBD-II code for nox adsorber regeneration not complete. Same code, same fix: this page covers every spelling of it.
P2005 is a emissions fault code, typically costing £120–£900 to put right in a UK garage.
What causes P2005?
- Repeated short trips stopping regeneration
- Faulty temperature or NOx sensor
- Low AdBlue quality or level on SCR systems
- EGR fault raising engine-out NOx
How P2005 is fixed
- Do a 30-minute run above 2,000rpm
- Check for related sensor codes
- Verify AdBlue level and quality where fitted
- Force a regeneration at a garage
P2005 repair cost in the UK
Most P2005 repairs land between £120–£900 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 P2005?
Yes, but plan a long run soon or it will escalate.
Urgency: medium.