If your diesel has a DPF warning light, keeps going into limp mode, or your fuel economy has dropped, your DPF may be blocked with soot/ash. At MCR Auto Mechanic & MOT, we provide DPF diagnostics and professional cleaning for cars and vans — with a clear process and honest advice.
Results vary depending on DPF condition and underlying vehicle faults.
DPFs block up most often when a vehicle is used for:
short trips / stop-start driving
low-speed city driving
repeated interrupted regenerations
Other underlying issues can cause the DPF to block again, such as EGR faults, boost leaks, injector problems, glow plug issues, incorrect oil, or sensor faults. That’s why we always start with diagnostics — cleaning without fixing the root cause can be a temporary fix.
We check fault codes, live data, and signs of related issues (sensors, EGR/boost, temperature readings, differential pressure readings where applicable). You’ll get a clear explanation of the results.
If the DPF load level and vehicle condition allow, we can carry out a guided/forced regeneration using professional diagnostic equipment.
If regeneration alone won’t resolve it, we’ll advise the best option based on the blockage severity and the vehicle’s symptoms. Where appropriate, this can include professional cleaning methods designed to restore exhaust flow and reduce soot loading.
We re-check readings, clear faults where appropriate, and road test to confirm the fix.
Important: If your DPF is physically damaged, heavily ash-loaded, or there’s a serious underlying engine fault, cleaning may not be the right answer we’ll tell you straight.
We regularly help trades and commercial drivers who can’t afford downtime. If you run a small fleet or use your van daily, we can prioritise quick diagnosis and a practical fix to get you back on the road.
Proper diagnostics-first approach (not guesswork)
Clear explanation of what’s causing the issue
Professional equipment and experienced technicians
Convenient location for Heywood + easy access from Salford/Manchester
Honest advice — if cleaning won’t help, we’ll say so
Sometimes you can for a short time, but it can quickly get worse and cause limp mode or more expensive repairs. It’s best to book in early.
Often yes, if the DPF blockage is the cause. We confirm this with diagnostics before proceeding.
It depends on severity and the method needed. Many issues can be resolved same day once diagnosed.
It can if the driving pattern stays the same or there’s an underlying fault (EGR, sensors, boost leak, injectors etc.). We advise on prevention and any related repairs.
No we only offer legitimate repair and cleaning solutions.