AdBlue solutions
AdBlue off / SCR delete files
We deliver professional AdBlue off files to workshops and tuners. The SCR/AdBlue system is deactivated in software using your original read, and every file is checked before delivery.
What we do
AdBlue dosing and NOx monitoring are disabled in software so the system no longer triggers fault codes or limp mode. This is often relevant for vehicles used outside regulated markets or on track.
How it works
Send us the original read from the vehicle, including make, model, engine and ECU details. We write a file that disables the AdBlue system to your workshop's specification.
Why choose SCT Tuning
Manual file writing
Every file is written from your original read, not pulled from a generic database.
Checked before delivery
We verify the changes are consistent and safe before the file is returned.
Fast delivery
Standard files are normally delivered within 15–25 minutes during office hours.
Direct support
You talk to the people who write the files — not a ticket system.
Order an AdBlue off file
Submit the original read and we will assess the vehicle and deliver a safe, tailored solution.
Typical AdBlue and SCR problems
AdBlue faults are among the most expensive workshop jobs, which is why fleets and machine owners look for a software solution.
- Starting countdown: "engine start not possible in X km"
- NOx sensor, dosing module or AdBlue pump failures after every winter
- Crystallised urea blocking the injector and dosing lines
- Derate to 20 to 60 km/h even with a full AdBlue tank
- Machines and export vehicles in regions where AdBlue is hard to source
What is included in an AdBlue off file
The complete SCR monitoring chain is handled, not just the dosing map, so the countdown and derate cannot return.
- Urea dosing and pump control switched off
- NOx sensor upstream and downstream plausibility checks disabled
- AdBlue level, quality and tank heater monitoring switched off
- Countdown, inducement and torque derate strategies removed
- SCR fault codes and readiness monitors disabled so no warning lamp appears
Trucks, buses and machines
Heavy duty is a large part of our AdBlue work: Scania, Volvo, MAN, DAF, Mercedes Actros, Iveco, plus John Deere, Case, New Holland, Fendt, Claas and Deutz machines. Car and van SCR platforms such as Bosch EDC17 and MD1 are covered as well.
How to order an AdBlue off file, step by step
Most SCR ECUs are read on the bench or over OBD with a master tool; tell us which method you used so the file comes back in the right format.
1. Read the ECU
Read the original engine ECU file with KESS3, Autotuner or FLEX. On many trucks the SCR/DCU module needs handling too — tell us if you have read it.
2. Collect the vehicle details
Make, model, year, engine and ECU type, hardware and software numbers, current AdBlue fault codes and whether the vehicle is already in derate.
3. Upload the file
Send the read through the customer portal, select AdBlue / SCR off and note any combination with EGR off or DPF off.
4. We write and check the file
We disable dosing and the whole monitoring chain from your original read, then verify the file before returning it, normally within 15 to 25 minutes in office hours.
5. Write and verify
Flash the file, clear all fault memory including the SCR module, then road test and confirm the countdown, warning lamp and derate are gone.
Useful next steps
Frequently asked questions
What does AdBlue off / SCR off do?
The SCR system and its dosing, level and NOx monitoring are switched off in the engine software, so the vehicle does not count down or restrict power because of the AdBlue system.
Does the countdown and warning disappear?
Yes, when the whole SCR monitoring chain is handled. That is why we write the file from your original read instead of using a generic patch.
Do you cover trucks and agricultural machines?
Yes. Truck, bus and agricultural ECUs are a large part of our AdBlue work. Send the original read with the ECU details and we confirm coverage.
Is AdBlue off legal?
On road-registered vehicles emission systems normally have to stay active. These files are intended for off-road, motorsport or export use, and the workshop is responsible for how they are used.
Does the AdBlue countdown and derate come back later?
Not when the whole monitoring chain is handled. If only the dosing map is switched off, the NOx plausibility checks will restart the countdown after a few hundred kilometres, which is why we always write from your original read.
Can I keep driving with a failed NOx sensor or dosing pump?
With the SCR monitoring switched off the ECU no longer reacts to the failed component, so the vehicle runs without derate. The faulty part stays fitted, it is simply no longer monitored.
Do you need the SCR or DCU module read as well?
On many trucks and buses, yes. Tell us which modules you have read and we confirm what is needed before you pay.
Can AdBlue off be combined with EGR off, DPF off or Stage 1?
Yes, and most workshops do. One combined file means the ECU is written only once, and combinations cost less than ordering each solution separately.