201 King Street, Fenton, Stoke-on-Trent ST4 3ER
Open Mon–Sat 9am–6pm · Closed Sunday
Home › Services › EGR Valve Cleaning
From £120 · Open Monday to Saturday in Fenton
A sticking EGR valve causes rough idle, flat spots and emissions faults, and it can block your DPF. We remove the valve, strip the carbon off it, refit it and check the live data at our Fenton workshop.
Valve removed and cleaned
Fresh gasket fitted
Adaptations reset
Live data checked after
Get a free quote
Tell us the reg and what the car is doing. We’ll come back with a straight answer and a price.
2,500+
Cleans completed
From £200
On-car DPF clean
Open Monday to Saturday
Fenton workshop
UK-wide
Postal DPF cleaning
How it works
The EGR valve feeds a small amount of exhaust gas back into the intake to keep combustion temperatures and NOx emissions down. Short journeys, low-speed driving and idling leave soot and oily vapour on it, and over time the carbon hardens and the valve sticks.
We remove the valve, soak it in a decarboniser and scrub the carbon from the pintle and passages. Then we refit it with a fresh gasket, reset the adaptations and check the live data to make sure the valve is moving as it should.
Sprays can loosen light deposits, but once the carbon has hardened, the valve needs to come off to be cleaned properly.
The valve comes off without disturbing the coolant lines.
Soaked and scrubbed to clear the pintle and passages.
Refitted with a fresh gasket.
Adaptations reset and live data checked.
A Peugeot 2008 after a DPF and EGR fix
A Citroën Relay van after a DPF and EGR fix
A Volvo after a DPF and EGR fix
Symptoms
A scan shows whether the commanded and actual EGR positions match. These are the symptoms that usually bring drivers in.
The valve sticks part-open and upsets the air-fuel balance at idle.
Hesitation when you pull away or accelerate.
The ECU can’t keep the fuelling right with a sticking valve.
Codes such as P0400, P0401 or P0402, often with the engine light on.
The ECU cuts boost and fuelling to protect the engine.
Soot from a dirty EGR system loads the DPF faster.
Why it matters
When the valve sticks, the engine loses its balance of fresh air and recycled exhaust gas. Combustion temperatures rise, NOx goes up and the idle gets rough, and the ECU may cut power.
Soot from a dirty EGR system also ends up in the DPF, so it blocks sooner and needs regenerating more often. Cleaning the valve before it seizes protects the DPF, turbo and sensors, and it’s usually much cheaper than a new electronic valve. EGR cleaning starts from £120. Prices shown are starting prices. The final price depends on many factors, including the vehicle and how complex the job is, and we confirm it before any work starts.
A dirty EGR valve is one of the most common reasons a DPF keeps blocking. We can clean both in the same visit.
Vehicles
Some diesel engines coat their EGR valves with carbon faster than others, especially on short town runs where the exhaust never gets hot enough to burn the deposits off.
Town driving and idling cake the pintle in soot, bringing rough idle and P0402 flow errors.
Short commutes clog the EGR cooler, and an EGR temperature fault follows.
Sticky cooler flaps raise NOx and put the engine light on.
Carbon in the EGR housing leaves the valve jammed half-open and the idle hunting.
High-mileage taxis build heavy carbon across the valve and cooler, throwing P0400.
Stop-start delivery work clogs the valve, and the van loses power on hills.
Service
DPF Cleaning & Regeneration
On-car, off-car and postal DPF cleaning with a controlled forced regeneration.
Service
Engine Carbon Cleaning
Hydrogen carbon cleaning for intake, valves and turbo passages. From £100.
Service
O2 / Lambda Sensor
Lambda sensor checks and cleaning for fuelling and emissions faults. From £80.
Remapping and AdBlue
We work alongside our sister companies. ECU remapping is done by Pro Remapping, from the same Fenton workshop, and AdBlue and NOx faults are handled by AdBlue Specialist.
What does an EGR valve do, and why does it clog?
It feeds a small amount of exhaust gas back into the intake to lower combustion temperature and NOx emissions. Short journeys, low-speed driving and poor fuel quality leave soot and oily vapour on the valve, and over time it gums up and sticks.
How do I know my EGR valve needs cleaning?
Common signs are a rough idle, flat spots when you accelerate, higher fuel use and fault codes such as P0400, P0401 or P0402. A scan will show whether the commanded and actual EGR positions match.
Will a spray clean work as well as removing the valve?
Sprays can loosen light deposits, but once carbon has hardened on the pintle and seat, the valve needs to come off to be soaked and scrubbed. That restores its full range of movement and lasts much longer.
Is EGR cleaning safe for my engine?
Yes. We disconnect the battery, remove the valve without disturbing the coolant lines, fit a fresh gasket and reset the adaptations with diagnostic equipment afterwards.
How long does it take?
It depends on the vehicle and how easy the part is to get to, so we’ll give you a time when you book. Same-day slots are often available if we have space.
How much does EGR valve cleaning cost?
EGR valve cleaning starts from £120. Prices shown are starting prices. The final price depends on many factors, including the vehicle and how complex the job is, and we confirm it before any work starts. It’s usually much less than a new electronic EGR valve. Call or message us for a quote.
Can cleaning the EGR help with the MOT?
A sticking valve can raise emissions and put the engine light on, which are both MOT problems. Cleaning restores proper exhaust gas recirculation, so it’s worth doing before the test if you have EGR faults.
Do you offer a mobile service?
No. All our work is done at our Fenton workshop in Stoke-on-Trent, where we have the equipment to diagnose the fault and check the results properly. We’re open Monday to Saturday, with same-day slots when there’s space.
Call or WhatsApp us with the reg and what the car is doing, and we’ll tell you whether the EGR is the problem.
201 King Street, Fenton, Stoke-on-Trent ST4 3ER · Open Mon–Sat 9am–6pm, closed Sunday · Visits by appointment