AdBlue Frequently Asked Questions

If the AdBlue warning remains active after you have topped up the tank, the fluid level was unlikely to be the original issue. Frequent causes include a defective sensor for fluid level or quality, a malfunctioning heater, an issue with the dosing system, or a NOx sensor giving an out of range reading. Some cars also require a short drive for the system to re-scan the tank level. The most efficient way to pinpoint the fault is to read the error codes stored in the vehicle's memory.

AdBlue warning after topping up

Quite often, the engine will run normally even with an AdBlue fault stored. However, certain vehicles will engage a reduced power mode or limit speed if the fault is severe or has been ignored for a time. The main danger is the vehicle refusing to start once a countdown hits zero. If you experience lower engine power along with an AdBlue warning, getting the fault codes read before a long trip is advisable.

Yes, it can. AdBlue must conform to the ISO 22241 standard. Introducing water, diesel, or old, contaminated fluid into the AdBlue tank can activate a quality warning and could potentially harm the pump or injector. If you have put the wrong liquid in, do not drive the vehicle and let us know precisely what was used so we can offer the best advice.

Some more recent vehicles are equipped with engine computers that have software protection, which must be unlocked before we can perform any modifications. Our technicians can verify your ECU's status and let you know if an unlock is necessary. This is a separate service, and we will always confirm any extra cost with you before we proceed. The need for an unlock relates to the specific ECU hardware and software, not just the vehicle's age. Some ECUs have established workarounds, others need specialist handling, and a small number cannot be supported at present.

A repair involves identifying and replacing the failed component, like a pump, heater, or sensor, to get the factory system functioning again. We do not provide repair services or fit new parts. Our AdBlue Delete and AdBlue Removal service is a software solution that alters the engine computer's programming to bypass the AdBlue system. We always check suitability and agree on the price before undertaking any work.

AdBlue DeleteAdBlue Removal

These terms are often used interchangeably by customers to describe similar software-based solutions. The word 'Removal' is sometimes used by those who think physical parts need to be taken off the vehicle, but for most cars and vans, the work is done entirely within the engine's software. We will explain the exact process for your specific vehicle when we provide your quote.

AdBlue Removal

We support a wide range of diesel cars and vans that use AdBlue. However, whether we can work on a vehicle is determined by its specific engine and ECU type, not just its model. If you provide us with your vehicle's registration, we can check its compatibility and give you a quote.

Vehicles we cover

Yes, we are a fully mobile service., a technician will come to your home, workplace, or another convenient location with all the necessary diagnostic tools. We can read fault codes and view live data on-site, allowing us to confirm if your vehicle is a good candidate for a mobile AdBlue Delete or Removal before beginning any work.

Not necessarily. A fault code will highlight the part of the system where an issue is being detected, but the same code could be triggered by problems with wiring, connectors, software, or even another component. For this reason, we analyse live data and test the system instead of just replacing a part based on a code.

Not always. A NOx sensor fault code can be triggered by issues with wiring or connectors, leaks in the exhaust system, a sensor that hasn't reached its operating temperature, or a problem elsewhere in the AdBlue system that's affecting its readings. The sensor should be properly tested to confirm it is faulty before being replaced.

Frequent issues include the pump or lines getting blocked by crystallised AdBlue, a broken pump motor, a heater failure during cold weather, electrical wiring faults, and using contaminated fluid. The code P20E8, indicating low reductant pressure, points to a supply issue but doesn't conclusively prove that the pump itself is the sole cause of the failure.

No, P2002 indicates that the diesel particulate filter's efficiency is below the expected threshold for bank 1. This fault is associated with the DPF system, not the AdBlue system, though issues with both exhaust after-treatment systems can sometimes occur at the same time.

Yes, we can. A countdown indicates that the engine's computer has registered a serious AdBlue system fault and will prevent the engine from starting once the displayed distance runs out. It's best to contact us before it reaches zero, telling us how many miles are left. We can then explain your options and book an appointment, subject to our technician's location and availability.

On most vehicles, if the engine is already running when the countdown ends, it will continue to run. However, once you turn it off, it will not restart. The vehicle will then be immobilised until the underlying AdBlue fault is resolved. If your countdown is low, you should plan any journeys and stops very carefully.

Yes, we do offer a 24/7 emergency callout service. Our standard operating hours are from 8 AM to 8 PM, Monday to Sunday, UK time.

We confirm the full price with you before a technician is sent, so you know the cost upfront.

We offer mobile appointments throughout England, depending on your location and our technician availability. By prior arrangement, we can also provide assistance at certain UK ferry ports and in some areas of France. To check coverage, send us your postcode via WhatsApp or use the checker on our homepage.

Ferry ports and France

This depends on your specific location, what work is required, and our schedule for that day. When you get in touch, we will provide a realistic estimated arrival time rather than making a promise we might not be able to fulfil.

The cost is based on your specific vehicle, its ECU type, and your location. If you send us your registration number and postcode, our team can give you an accurate, personalised quote. We will always explain any potential extra charges before confirming your booking.

You can message us on WhatsApp at 07356 057295 or use the simple form on our website. Please include your registration, postcode, and mobile number. The final price is determined by your vehicle, its location, and the work involved, which we will confirm with you before we begin.

Payment is to be made upon completion of the work, unless an alternative arrangement has been agreed with us beforehand.

Terms

The warranty applies specifically to the software modification we perform on your vehicle. Should a problem arise with the work we carried out, we will correct it. Please note that subsequent main dealer software updates or manufacturer recalls will void this warranty. The warranty does not cover callout fees.

Warranty terms

Please send us your vehicle's registration number, your postcode or current location, and a brief summary of the issue. Including a photo of the dashboard warning light, especially any countdown mileage shown, helps us provide faster and more accurate advice. When WhatsApp opens, remember to hit send to transmit your details to us.

Yes, routine servicing can continue as normal. You should inform your garage of the software work we have performed. If any AdBlue-related warnings return after a service, please contact us directly so we can investigate.

Our work modifies the vehicle's emissions control software. The laws governing these types of modifications can vary between countries and depending on how the vehicle is used. You are solely responsible for ensuring that your use of the vehicle is compliant with all relevant legislation. If you have any doubts, please raise them with us before booking. This is covered in full in our Terms.