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Citroën Relay AdBlue Delete: Fix for Large Van SCR & NOx Issues

Citroën Relay van with AdBlue Fix branding, representing mobile AdBlue delete and removal service for commercial vehicles
Illustrative image.

The Citroën Relay is a workhorse for many tradespeople, delivery drivers, and fleet operators. However, its AdBlue (SCR) system can often be a source of frustration, leading to dashboard warnings, costly repairs, and reduced vehicle performance. These issues can result in lost income and wasted time for busy van owners. AdBlue Fix offers a specialised solution for Citroën Relay AdBlue system problems.

Common Citroën Relay AdBlue Issues

The Citroën Relay's AdBlue system, designed to reduce emissions, frequently causes problems for owners. Instead of performing as intended, it can lead to persistent warnings, expensive component failures, or the van entering a restricted power mode.

Typical Citroën Relay AdBlue system issues include:

Our AdBlue delete service aims to address these issues, allowing your van to run without the AdBlue system's common failures. This means no more AdBlue refills and no more AdBlue system related warnings.

  • Dashboard warning: "No engine start in 700 miles – AdBlue fault."
  • Frequent NOx sensor failures.
  • Fault codes such as P20E8, P207F, P229F.
  • High repair bills from main dealers.
  • Vans losing power and slowing down.

Citroën Relay AdBlue & NOx Fault Codes We Address

The AdBlue system in the Citroën Relay can trigger a range of specific fault codes, indicating various malfunctions within the Selective Catalytic Reduction (SCR) and NOx sensor components. These codes often point to issues such as incorrect AdBlue fluid quality, pressure problems, or sensor failures, which can prevent the van from operating correctly or lead to limp mode.

Here are some of the most common Citroën Relay codes associated with AdBlue and NOx system issues:

  • P20E8 – Reductant Pressure Too Low
  • P207F – Reductant Quality Performance
  • P229F – NOx Sensor 2 Bank 1 Performance
  • P20EE – SCR NOx Catalyst Efficiency Below Threshold
  • U029D – Lost Communication with NOx Sensor

How Our Mobile Service Works

We have developed a straightforward process designed for the convenience of busy van drivers and fleet operators. Our mobile service aims to resolve your AdBlue system issues efficiently at your location, subject to technician availability.

Our process typically involves these steps:

  • You contact us with details of your vehicle and symptoms.
  • We assess the suitability of our service for your specific vehicle and issues.
  • Upon confirmation, we provide a clear quote for the work.
  • We arrange an appointment for our mobile technician to visit you, subject to availability.

Areas Our Mobile Technicians Cover

Our operational base is near Slough, but our experienced team of mobile technicians covers a wide area across England. This includes a radius of approximately 70 miles around Slough, ensuring local coverage for towns such as Windsor, Maidenhead, Reading, High Wycombe, Uxbridge, Heathrow, Bracknell, Egham, and Hounslow.

Beyond this local area, our network of technicians allows us to serve customers in much of England, bringing our specialised service directly to your location. We strive to provide a convenient and accessible solution for Citroën Relay owners facing AdBlue system problems wherever they are.

Why Choose AdBlue Fix for Your Citroën Relay

We understand the critical role your Citroën Relay plays in your daily operations. Dealing with AdBlue system faults can be a significant disruption, both financially and operationally. Our team has helped thousands of customers, accumulating extensive experience with commercial vehicles like the Citroën Relay.

We focus on providing an effective electronic solution that integrates seamlessly with your van's ECU, aiming to prevent recurring AdBlue system problems from affecting your vehicle's performance. Our service is designed to offer a practical resolution for these common and often costly issues.

Customer FAQs

How long does a Citroën Relay AdBlue removal take?

Typically, the process for electronic AdBlue removal takes approximately 1 hour, although this can vary slightly depending on the specific vehicle.

What if my NOx sensor is already faulty?

If your NOx sensor is already faulty, our electronic solution is designed to address the system comprehensively, which includes the NOx system, aiming to prevent related fault codes from recurring.

Do you offer a mobile service?

Yes, we provide a mobile service across much of England. Our technicians can come to your location, subject to availability, making the process convenient for you.

What happens after the AdBlue system is electronically removed?

After our service, the vehicle's engine control unit (ECU) will no longer request AdBlue fluid or monitor the AdBlue system components, meaning related dashboard warnings and limp mode instances due to AdBlue faults should no longer occur.

Need Help With an AdBlue Warning?

Send your registration, postcode and a photo of the warning. We check suitability and confirm the price before anything is booked.

More about this service

Helping Thousands of Customers With AdBlue Problems

Why Choose AdBlueFix?

At AdBlueFix, we specialise in permanent AdBlue delete remapping services, using advanced ECU software solutions to eliminate AdBlue system faults, NOx sensor issues, dashboard warning lights and frustrating no-start countdowns.

Having helped thousands of customers, our experienced mobile technicians provide professional AdBlue remapping services across England. We come directly to your home, workplace or roadside location, offering a convenient service without the hassle of visiting a garage.

We provide professional AdBlue delete software solutions backed by a lifetime software warranty on eligible work. Our focus is delivering lasting solutions, avoiding unnecessary sensor replacements and helping customers get their vehicles back on the road with confidence.

Featured 5-Star Customer Reviews

Trusted by Customers Across England

See Why Drivers Choose AdBlueFix

We've helped thousands of customers with AdBlue-related problems. Discover what drivers say about our mobile service, professional technicians and customer support.

4.9 on Google

500+ Verified Google Reviews

  • “Brilliant service, my car is running better than ever with no pesky adblue issues. Would highly recommend”

    Turtle

    13 Oct 2026

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  • “Engineer called me ahead of time and arrived on time. He was very friendly and knowledgeable and fixed my adblue fault in around 25 mins. Really pleased with the service”

    Christopher Lisseman

    9 Oct 2026

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  • “Really good customer service. Took less than 30 minutes for the adblue delete and got the stage 1 re mapp for free by paying with cash. Straight away can feel the difference”

    Greg Harrison

    7 Oct 2026

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  • “E.G. fixed the AdBlue fault on my vehicle. Great service and highly recommended!”

    H Sayid

    1 Oct 2026

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  • “Fixed my ad blue issue, punctual, polite. Highly recommend.”

    Harry Swales

    22 Sept 2026

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  • “Same day rescue with an adblue fault done on my truck. Quick response and service nice guys and have recommended to others.”

    Antonio Acacio

    13 Sept 2026

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  • “E G fixed my ad blue problem. Would highly recommend them. Excellent customer service”

    Keith Hiam

    1 Sept 2026

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  • “Fixed my adblue fault. Highly recommend.”

    Ibrahim Rajab

    31 Aug 2026

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  • “Car was locked on the driveway for a week with emissions fault (second time in 18 months) and nearest dealer 30 miles away with no appointments for the foreseeable. Had the AdBlue fix, sorted for good. Amir was friendly and informative. No hesitation to recommend the AdBlue solution”

    Kevin Worrall

    29 Aug 2026

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  • “Contacted these guys and they came out within 2 days fixed the car and now all is perfect again really happy with the remap done on my car too very polite, efficient service and would highly recommended”

    Chris Green

    28 Aug 2026

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  • “Excellent service from start to finish. Very polite, professional and efficient. They diagnosed and fixed the AdBlue fault on my vehicle quickly and at a great price. Really pleased with the service and would highly recommend them to anyone.”

    Fuad Bin Ibrahim

    28 Aug 2026

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  • “Really happy with the remap done on my car, polite, efficient service and would highly recommended…”

    Radek Wo

    28 Aug 2026

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  • “Very happy with the adblue fix and remap done on my car. Having spoken with a helpful chap initially, another polite technician arrived on time to our home address, and undertook the job efficiently. Would highly recommend.”

    Brett Ray

    25 Aug 2026

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  • “Solved all mgt engine warning emission Great professional services”

    Andrew Hay

    25 Aug 2026

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  • “Absolutely amazing guys . Quick quote. Next day they delete the ad blue . Highly recommend it !”

    Georgiana Ionescu

    24 Aug 2026

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  • “The car technician Amir was brilliant great personality Did what he had to do very professionally and solved my adblue fault and other fault on my land rover discovery sports Would highly recommend this company Thank you Jeff Dudley”

    Jeff Dudley

    17 Aug 2026

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  • “don't know why I didn't get these people to do this sooner! no more expensive problems with adblue system, and on top of that vehicle running much better. the guy that carries out the work even does a full scan of the ecu to let you know of any outstanding fault codes before work commenced.”

    p h

    10 Aug 2026

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  • “Very happy with them straight forward They fixed Adblue fault and since then everything has been fine thank you Highly recommend them”

    Adrian BUHAI

    29 Jul 2026

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  • “Fixed the adblue fault on my car. Very prompt and efficient. Great service would recommend.”

    Clive Eskriett

    25 Jul 2026

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  • “Fantastic service, highly recommend this company. They've just fixed the adblue transmission issue on my van and carried out a engine tune so it now runs better than its ever done. Fast and efficient booking service and expert mechanic.”

    Jordan Thomas

    24 Jul 2026

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