DPF fault codes explained, P2463 and P2002
If your engine management light has come on and a scan has returned a DPF fault code, you are in the right place. The two codes we see most often are P2463 and P2002. Both relate to your diesel particulate filter, but they tell slightly different stories, and understanding which one you have makes a real difference to what happens next.
What is fault code P2463?
P2463 means “particulate filter soot accumulation, high.” In plain terms, your DPF has collected more soot than the engine management system is comfortable with, and it was not able to clear it through its normal self-cleaning process (called regeneration).
Regeneration happens automatically on longer motorway-type runs, where exhaust temperatures get high enough to burn off the trapped soot. If your driving is mostly short journeys, slow urban traffic, or lots of stop-start work, the filter never gets hot enough to regen. Over time the soot builds up until the system triggers P2463.
At this stage the filter is blocked but usually still intact. A chemical DPF flush, which is what we do, can clear the blockage without removing or replacing the filter.
What is fault code P2002?
P2002 means “particulate filter efficiency below threshold.” Where P2463 flags a filter that is too full, P2002 flags a filter that is not doing its job well enough. The ECU monitors how much soot is being trapped and compares it against what should be there. If the numbers fall short, P2002 fires.
This can mean one of two things: the filter is so heavily blocked that flow and capture efficiency have both dropped off, or in rarer cases, the filter substrate itself is damaged and letting soot pass straight through. A diagnostic check will tell us which scenario applies before we recommend any work.
What to do if you have either code
Do not ignore a DPF fault code and keep driving. Continued use with a blocked filter puts strain on the engine and can push the vehicle into limp mode, where power is severely restricted. In the worst cases a heavily blocked filter can overheat and crack, turning a £275 clean into a £1,000-plus replacement.
The right first step is a diagnostic check. We carry out a free diagnosis before any work, checking live pressure differential data, soot load readings and any supporting fault codes. If a chemical flush is the correct fix, we carry it out on the same visit. If it turns out the filter is damaged rather than just blocked, we will tell you that too, so you know exactly where you stand before spending anything.
Our mobile service covers all of Greater Manchester. We come to your home or workplace, so there is no need to arrange recovery or drop the car at a garage. The price is £275 fixed, no hidden charges, no surprises on the day.
Call us on 0161 694 7331 or get in touch below to book your free diagnostic.
