AdBlue Delete /Everything You Should Know About AdBlue Removal software and ECU

What Is AdBlue or SCR? 

AdBlue, DEF (Diesel Exhaust Fluid), and SCR (Selective Catalytic Reduction) are components of a vehicle's emission control system designed to reduce harmful nitrogen oxide (NOx) emissions produced by diesel engines. These technologies work together to ensure diesel engines comply with stringent environmental regulations. AdBlue is a high-purity urea solution (32.5% urea and 67.5% deionized water) injected into the exhaust stream of diesel engines equipped with SCR systems. It breaks down harmful nitrogen oxide (NOx) emissions into nitrogen (N₂) and water (H₂O), which are harmless to the environment.

What Is AdBlue Off car & Why Is It Done?

AdBlue delete refers to disabling the AdBlue/DEF (Diesel Exhaust Fluid) system in a diesel vehicle by modifying its ECU. This process prevents the vehicle from using AdBlue fluid, effectively bypassing the SCR system. AdBlue Off is typically achieved through ECU remapping or by installing an emulator device.

It’s mainly done for cost reduction, AdBlue can be expensive and disabling the system eliminates the need for fluid refills and SCR maintenance. Some users believe that bypassing the AdBlue system can improve performance, especially in tuned or modified vehicles.

"You should also know that the maintenance and repair costs of the AdBlue system are high, and many owners of diesel vehicles, particularly truck owners, prefer to permanently remove Adblue system.

How To Disable AdBlue System

There are two ways to delete AdBlue:

1-AdBlue Removal Kit / Emulator Installation: 

An emulator device is installed to trick the ECU into thinking the AdBlue system is functioning correctly. AdBlue Delete Kit simulates sensor readings and fluid levels, preventing dashboard warning lights. We do not recommend this method, because it just doesn’t always work, enables limp mode, turns the check engine light and voids warranty.

Instead, we recommend the second procedure

Removing AdBlue/SCR Through ECU Remapping:

In this method, we use a programmer to read the ECU file and different software to modify the SCR system in order to disable the injection of AdBlue inside the exhaust. After, all the DTC codes related to SCR/AdBlue are also removed from the ECU.

Diesel AdBlue Delete Pros & Cons

AdBlue Off Benefits:

1. Reduced Maintenance Costs’
2. No More AdBlue Refills
3. Improved Engine Performance
4. Avoiding System Failures
5. Simplified Tuning Potential

AdBlue Removal Disadvantages:

1. Legal and Environmental Concerns
2. Higher NOx Emissions
3. Voided Warranty
4. Failed Emissions Tests
5. Check Engine Light & Error Codes

AdBlue Delete Problems to Consider:

1. Incorrect ECU Remapping
2. SCR Emulator Malfunction
3. System Compatibility Issues
4. Sensor and Injector Malfunctions

A poorly configured ECU file during AdBlue delete can cause drivability issues, reduced engine performance, or frequent warning lights.

Using low-quality or incompatible AdBlue emulator devices may cause system faults and engine warnings.

Different vehicles and ECU types require specific tools and software for AdBlue delete. Inexperienced tuners may damage the ECU.

If the AdBlue system is not fully disabled or the software configuration is incomplete, leftover components like NOx sensors may still trigger faults.

Common Error Codes Related to AdBlue

Popular fault codes related to AdBlue are: P20E8, P207F, P204F, P203B, P20EE, P229F, P2BA9, P204C, P2200, P2047. Why do theses trouble codes appear depends on different factors which we will give you examples about: 

OBD P20EE DTC - SCR NOx Catalyst Efficiency Below Threshold 

Cause:The SCR system isn’t reducing NOx emissions effectively.

Why it Appears:

• Faulty NOx sensor
• Catalytic converter problems
• Incorrect ECU calibration

OBD P229F DTC - NOx Sensor Circuit Performance (Bank 1, Sensor 2)

Cause: Malfunction in the second NOx sensor circuit.
Why It Appears:

• Failed NOx sensor
• Wiring or ECU communication errors 

OBD P204F DTC - Reductant System Performance Bank 1

Cause :

• defective reductant pressure sensor
• bad reductant system injector
• contaminated diesel exhaust fluid (DEF)
• failed SCR controller

For example, the code P13DF is a common error code in Mercedes-Benz means Adblue system has a malfunction.

Also, AdBlue error code ford is P207F common: Reductant Quality Performance 

This code is triggered when the quality of the AdBlue fluid is not within the acceptable range. The system may detect contaminated or incorrect fluid. 

Causes: 

• Contaminated AdBlue
• improper AdBlue fluid
• faulty NOx sensor.

These DTCs might appear after installing an AdBlue Removal Kit, because it emulates the system and tricks the ECU but sometimes it doesn’t work properly.

You can send us your ECU file to our Tuning File Service for AdBlue off solution to remove DTCs related to any kinds of systems such as EGR, AdBlue, DPF, Catalyst, EGR, etc.

AdBlue Off Software & Tools

In order to delete AdBlue from the ECU, firstly we need tools to get an original read file from the ECU. Different programmers like KESS3, Autotuner, Dimsport, KTAG and FLEX are used to read/write the ECU file through OBD2 port.

The file is then loaded inside the WinOLS software which is the most comprehensive and customizable ECU editing software, suitable for expert tuners. With enough knowledge and experience, you are able to identify maps and values related to AdBlue and can modify them. Remember that using WinOLS requires a lot of practice and its for sure not an easy process. This said, AdBlue Off using WinOLS requires a professional expert to be able to do it most efficiently.

Schiller tuning with over 10 years or experience in the WinOLS software, provides you with all kinds of services such as DPF OFF, AdBlue OFF, EGR Off, DTC Off and all types of ECU remapping. If you’re a tuner, you just have to read the original ECU file using the programmers we introduced and send it to, or if you’re a car owner who wants to remap their car for economy, performance and system removals you can get a read file from the nearest dealership in your area, and send it to our Tuning File Service, our experts will send you the remapped file in a short time.

How to Delete AdBlue from ECU Using Remap

To remove AdBlue through ECU remapping, you need to read the original file from the ECU using a programmer, locate AdBlue-related maps inside the WinOLS software, and modify the system parameters accordingly. This includes disabling the AdBlue injection process, adjusting NOx control strategies, and removing fault codes related to the SCR system. However, this process is highly complex and requires deep knowledge of ECU mapping. For this, you must have Damos or A2L files, which contain detailed ECU map definitions, enabling precise identification of AdBlue-related maps. Simply deleting diagnostic trouble codes (DTCs) is not enough, as incomplete modifications can cause the vehicle to enter limp mode or display incorrect sensor readings. Incorrectly modifying maps, NOx thresholds, or injection control settings can lead to system malfunctions, even without triggering error codes. Since each ECU has a unique configuration, AdBlue removal must be performed by an experienced tuner using professional tools and WinOLS software, ensuring all related maps are correctly adjusted for optimal performance.

It should be noted that software programs like ECM Titanium or RaceEvo do not have an option or table for removing AdBlue, and the reason for this is that such actions are illegal.

Adblue Removal service Cost/Price

The cost of an AdBlue delete service depends on several factors, mainly the type of car, the engine model, and the complexity of the ECU file. Each vehicle has a unique ECU configuration that requires a custom approach, meaning no single price fits all.

Why Choose schiller tuning for AdBlue Delete?

At schiller tuning, we specialize in professional ECU remapping services and ECU solution like AdBlue delete, EGR off, and DPF removal. With over a decade of experience in ECU tuning and software like WinOLS, our technicians can handle even the most complex ECU configurations, ensuring top-quality results.

Our Expertise Includes:
✅ Custom AdBlue delete software tailored to your car's ECU
✅ Support for all car brands, including passenger, commercial, and performance vehicles
✅ Remote tuning services through our file service platform

📌 Ready to get started?
Click the link below to access our file service platform. We are professionals at schiller tuning and can remap any car with precision and expertise. 🚗💨

Is AdBlue Removal Illegal? 

AdBlue Off is considered illegal in many regions, including the EU, USA, and UK, due to strict emissions regulations. Authorities may impose hefty fines on vehicle owners and companies found bypassing emission control systems. Additionally, vehicles with modified emission systems may fail inspections and be banned from public roads.

Conclusion

AdBlue removal, also known as AdBlue Off, offers advantages such as reduced maintenance costs, improved performance, and simplified tuning. However, it comes with significant drawbacks, including environmental concerns, legal risks, and potential ECU complications if not performed correctly. The process requires expert-level ECU remapping using advanced tools and software like WinOLS to ensure efficiency and reliability. At schiller tuning, we specialize in custom ECU remapping services, one of them being AdBlue Off. Whether you're a tuner or a vehicle owner, our experts provide professional, tailored solutions to optimize your vehicle's performance while addressing system-related faults.