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AdBlue Engine Start Not Possible Reset: A Comprehensive Guide

Dealing with an “AdBlue engine start not possible” error message on your car can be frustrating. This error message indicates a problem with your AdBlue system, which is crucial for reducing harmful emissions from your vehicle. In this article, we will explore the potential causes of this error, the steps you can take to resolve it, and some important things to consider.

Understanding the AdBlue System

AdBlue, also known as DEF (Diesel Exhaust Fluid), is a non-toxic solution that is injected into the exhaust system of diesel vehicles. It helps to break down harmful nitrogen oxides (NOx) into harmless nitrogen and water vapor. If your vehicle’s AdBlue system malfunctions, you will likely encounter an error message like “AdBlue engine start not possible” or “AdBlue system malfunction.”

Common Causes of “AdBlue Engine Start Not Possible” Error

Here are some of the most frequent reasons why your vehicle might display this error message:

  • Low AdBlue Level: When the AdBlue level in your vehicle’s tank falls below a certain threshold, the system will trigger the error message to prevent further driving.
  • AdBlue Tank Sensor Fault: The sensor that measures the AdBlue level in the tank might be faulty, leading to inaccurate readings and a false error message.
  • AdBlue Injection System Malfunction: The system responsible for injecting AdBlue into the exhaust could be clogged, malfunctioning, or have a faulty control unit.
  • AdBlue Quality Issues: Using substandard AdBlue can lead to system malfunctions and trigger the error message.
  • Software Glitches: In some cases, a software glitch in the vehicle’s control unit can cause the AdBlue system to malfunction and display the error.

How to Reset the “AdBlue Engine Start Not Possible” Error

Here are some steps you can take to attempt to reset the error message and get your vehicle running again:

  1. Check the AdBlue Level: The first step is to check the AdBlue level in your vehicle’s tank. You can usually find the AdBlue tank filler neck near the fuel tank. If the AdBlue level is low, simply refill the tank with high-quality AdBlue.
  2. Restart the Vehicle: After refilling the AdBlue tank, try restarting your vehicle. This can sometimes resolve the issue if it was due to a temporary low AdBlue level.
  3. Inspect the AdBlue Tank Sensor: If the AdBlue level is sufficient, inspect the AdBlue tank sensor for any signs of damage or malfunction.
  4. Check for Leaks: Carefully inspect the AdBlue system for any signs of leaks. Leaks can deplete the AdBlue level quickly and trigger the error message.
  5. Consult a Mechanic: If the error message persists after trying these steps, it is best to consult a qualified mechanic. They can diagnose the problem and provide appropriate solutions.

“A common misconception is that simply resetting the AdBlue warning light will resolve the underlying issue. While this might temporarily clear the error message, it won’t address the root cause of the problem,” says [Expert Name], a certified automotive technician with over 15 years of experience.

Important Things to Remember

  • Use Only High-Quality AdBlue: Always use high-quality AdBlue from reputable brands. Using substandard AdBlue can damage your vehicle’s AdBlue system.
  • Regular Maintenance: Regularly check the AdBlue level and have your vehicle’s AdBlue system inspected by a mechanic as part of routine maintenance. This can help prevent potential issues and costly repairs.
  • Professional Diagnosis: If you are unsure about the cause of the AdBlue error, it is always best to seek professional diagnosis and repair from a qualified mechanic.

Frequently Asked Questions

Q: What happens if I ignore the “AdBlue engine start not possible” error message?
A: Ignoring the error message can lead to further complications. Your vehicle might eventually refuse to start or experience reduced performance, and it could potentially damage the AdBlue system.

Q: Can I add AdBlue to a full tank?
A: It’s generally safe to add AdBlue to a full tank, but you should consult your vehicle’s owner manual for specific guidelines.

Q: How often should I check the AdBlue level?
A: The AdBlue consumption rate varies depending on the vehicle and driving conditions. It’s recommended to check the level at least once a month or whenever you fill your fuel tank.

Q: Can I use regular diesel fuel instead of AdBlue?
A: Absolutely not. AdBlue is a specific solution designed for diesel emissions control. Using regular diesel fuel in the AdBlue system can cause serious damage to your vehicle.

Q: Is there a way to bypass the AdBlue system?
**A: Bypassing the AdBlue system is illegal and could void your vehicle’s warranty. It’s crucial to maintain a functional AdBlue system for legal and environmental reasons.


Dealing with an “AdBlue engine start not possible” error message can be stressful, but understanding the issue and taking the appropriate steps can help you get your vehicle back on the road. Remember to use high-quality AdBlue, regularly check the level, and seek professional help when needed.