Regenerations start but do not achieve the result the ECU expects. Left alone, this ends in a fully blocked filter.
P2461 — also written P2461, P 2461, 2461 — is the OBD-II code for diesel particulate filter regeneration performance. Same code, same fix: this page covers every spelling of it.
P2461 is a emissions fault code, typically costing £120–£1600 to put right in a UK garage.
What causes P2461?
- Journeys too short to complete regeneration
- Faulty exhaust temperature sensor
- Failed post-injection or fifth injector
- Ash-loaded filter at end of life
- Low fuel level preventing regeneration
How P2461 is fixed
- Keep the tank above a quarter — many cars will not regenerate below it
- Check exhaust gas temperature sensors
- Forced regeneration at a garage
- Off-car clean or replacement if ash loading is high
P2461 repair cost in the UK
Most P2461 repairs land between £120–£1600 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 P2461?
Do a long run soon. A filter that never completes regeneration will block and put the car into limp mode.
Urgency: high.