What is AdBlue Reset and Why Need To Reset AdBlue?

Apr 24,2023
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What is AdBlue reset?

AdBlue, also known as Diesel Exhaust Fluid (DEF), is a liquid solution used in diesel engines to reduce harmful emissions of nitrogen oxides (NOx). The AdBlue system consists of a tank, a pump and various sensors to monitor liquid level, pressure and temperature. Whereas, AdBlue Reset is the process of resetting the AdBlue system counters after refilling the AdBlue tank.

Why need to reset AdBlue?

When we refilled the AdBlue tank, the AdBlue system needed to be reset to clear the warning light on the dash. Because the AdBlue system needs to know that the tank has been refilled and the fluid level is now normal.

If AdBlue is not reset, the warning light may continue to display even when the AdBlue tank is full, which can be annoying to the driver. There is another condition that, if the AdBlue system is not reset after refilling, can cause the engine to go into limp mode, a safety feature that limits engine power and speed to prevent damage to the engine or emissions system.

Therefore, we reset the AdBlue system after refilling the tank to ensure the engine is running properly and meeting emission standards.

How to reset AdBlue warning?

When the AdBlue water tank is low, a warning light will appear on the instrument panel, prompting the driver to refill the tank. So, how do I reset the AdBlue warning? In order to reset the AdBlue warning in the vehicle, we can follow these steps:

1. Find the AdBlue tank, usually under the hood or in the trunk of the vehicle

2. Fill the tank with AdBlue until the warning light goes off.

3. Start the engine and let it run for a few minutes to allow the system to recognize the new AdBlue liquid level.

4. Shut down and restart the engine to check if the warning light has reset.

After resetting, if the warning light does not go off, or if the tank is full but the warning light remains on. You may need to take your vehicle to a repair center for a professional technician to diagnose and reset AdBlue again.

Can AdBlue damage a diesel engine?

Many people have this question: Can AdBlue damage a diesel engine?

In fact, AdBlue is a solution of urea and deionized water, used as a diesel engine exhaust treatment fluid, which is specially designed to reduce harmful pollutants emitted by diesel engines. AdBlue is injected into the exhaust stream of a selective catalytic reduction (SCR) system in a diesel engine, converting NOx into harmless nitrogen and water vapour.

So, AdBlue is harmless to diesel engines, it does not directly interact with the fuel or the combustion process.

But we need to note that AdBlue can only be used in SCR-equipped diesel engines using this fluid. Adding AdBlue to a diesel engine that is not equipped with SCR technology may damage the engine and its components.

Can I run my diesel without AdBlue?

We do not recommend running diesel engines without AdBlue. If a diesel engine is run without AdBlue, the SCR system will not work properly, resulting in increased NOx emissions. This can lead to environmental hazards and potential penalties if the vehicle is subject to emissions regulations.Moreover, it will also cause damage to the engine itself. The purpose of the SCR system is to protect certain parts of the engine from the high-temperature exhaust gas. Without AdBlue, these parts will break down over time.

Can I use water instead of AdBlue?

No, water is not a substitute for AdBlue. Using water instead of AdBlue will not have the same effect and will damage the engine and exhaust system. Also, using water instead of AdBlue could cause your vehicle to fail emissions tests and violate environmental regulations. It is important to always use the proper fluid specified by the vehicle manufacturer to ensure proper operation and compliance with regulations.

What happens if you mix AdBlue with diesel?

AdBlue cannot be replaced with water nor mixed with diesel. If AdBlue is accidentally added to a diesel fuel tank, it can cause a variety of problems.

First of all, AdBlue does not mix with diesel, but forms a layer on the bottom of the tank. This can clog the fuel system and cause engine damage.

Additionally, AdBlue can corrode metal parts in the fuel system, including injectors, pumps and lines.

Therefore, if you accidentally mix AdBlue with diesel, be sure to stop the engine and drain the tank immediately. Affected components should also be inspected and replaced if necessary to prevent further damage.

5 Useful Adblue Reset Tools Recommended

iSmartLink D01: Multi-functional auto intelligent diagnostic tool. The Adblue Reset function supports multi-brand cars, such as BMW, Mercedes-Benz, Audi and other popular brands on the market.

iSmartIMMO 801: It is a professional car anti-theft matching programming tool with Adblue Reset.

iSmartEV P01: It is a professional-level diagnostic tool for electric vehicle battery packs, and has 35 special functions such as adblue reset.

iSmartEV P03: An integrated intelligent detector for electrical vehicles. The equipment integrates battery pack detection and whole vehicle system detection functions for electrical vehicles, and integrates oscilloscope, multimeter, insulation test and current clamp. And has 35 special functions such as adblue reset.

More FAQs about AdBlue:

Can AdBlue be switched off?

In modern diesel vehicles equipped with selective catalytic reduction systems, AdBlue cannot be turned off completely. AdBlue systems are an important component of vehicle emission control systems and are subject to strict environmental regulations in many countries. In many areas, turning off or bypassing the AdBlue system is illegal and may result in fines and penalties. Additionally, disabling the AdBlue system may cause the vehicle to fail emissions tests.

What are the disadvantages of removing AdBlue?

Removing AdBlue systems can have a variety of negative consequences, including:

① Reduce fuel efficiency: AdBlue system optimizes engine performance and fuel efficiency. Removing AdBlue may result in reduced fuel efficiency.

② Environmental impact: AdBlue is an important component in reducing harmful emissions, especially nitrogen oxide (NOx) emissions. Eliminating the AdBlue system will result in increased emissions, causing air pollution and negatively impacting the environment.

③ Legal Consequences: Due to strict emission regulations, it is illegal to disable or remove AdBlue systems in many areas. Doing so may result in fines, penalties, and suspension of vehicle registration or operations.

④ Engine damage and performance degradation: Some vehicles are designed to limit engine power or reduce engine performance if the AdBlue system is tampered with or fails to function properly. Removal of AdBlue may result in reduced engine performance and possible long-term engine damage.

⑤ Emission test failure: If your vehicle needs to pass an emissions test or inspection, removing AdBlue may cause the test to fail, making your vehicle non-compliant with local emissions regulations.

⑥ Warranty and Insurance Impact: In some cases, removal of the AdBlue system may void vehicle warranty and insurance coverage.

⑦ Resale value: Many potential buyers prefer vehicles that comply with emissions regulations, and vehicles that remove the AdBlue system may reduce resale value.

How long can you drive without adding AdBlue?

The range or distance you can drive without adding AdBlue (Diesel Exhaust Fluid or DEF) varies depending on your vehicle's AdBlue tank size and the rate at which your vehicle consumes AdBlue. On average, most vehicles equipped with AdBlue can typically travel for several thousand miles before requiring an AdBlue refill.


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