Adblue in Diesel Tank Symptoms

24/7 Hotline Nationwide: 0330 122 6640

National Wrong Fuel Rescue: https://www.misfuelledcarfixer.co.uk

If you found this page, we cover you!

Diesel engines equipped with Selective Catalytic Reduction (SCR) systems rely on AdBlue, a urea-based solution, to reduce harmful emissions. However, accidentally mixing AdBlue with diesel fuel can cause serious problems for your vehicle. Recognizing the symptoms of AdBlue contamination in your diesel tank early can save you from costly repairs and downtime. This post explains the common signs to watch for, what causes contamination, and what steps to take if you suspect your diesel tank has been compromised.

Diesel fuel nozzle in vehicle fuel tank

AdBlue in Diesel Tank Symptoms

AdBlue is a clear, non-toxic liquid made from high-purity urea and deionized water. It is injected into the exhaust stream of diesel engines to convert nitrogen oxides (NOx) into harmless nitrogen and water vapor. This process helps vehicles meet strict emission standards.

AdBlue is stored in a separate tank from diesel fuel. Mixing AdBlue into the diesel tank is a mistake that can happen during refueling, especially if the filler caps are similar or if the driver is unfamiliar with the vehicle. Because AdBlue is corrosive to some engine components and incompatible with diesel fuel, contamination can cause engine damage and performance issues.

Common Symptoms of AdBlue Contamination in Diesel Fuel

If AdBlue enters the diesel tank, the vehicle will show several warning signs. These symptoms usually appear soon after refueling and can worsen if the vehicle continues to run on contaminated fuel.

1. Engine Warning Lights and Error Codes

The first sign is often the illumination of the engine warning light or the SCR system warning on the dashboard. Modern vehicles have sensors that detect fuel quality and emission system faults. Contaminated fuel can trigger error codes related to fuel injection, emission control, or engine misfire.

2. Difficulty Starting the Engine

AdBlue contamination can cause the engine to crank longer than usual or fail to start. The urea solution affects the combustion process, making it harder for the engine to ignite the fuel-air mixture.

3. Rough Idling and Poor Acceleration

Once the engine starts, you may notice rough idling, hesitation, or stalling. The vehicle might struggle to accelerate smoothly or lose power under load. These symptoms occur because AdBlue disrupts the fuel’s combustion properties.

4. Unusual Exhaust Smoke

Contaminated diesel fuel can cause abnormal exhaust smoke. You might see white or blue smoke coming from the tailpipe, which indicates incomplete combustion or burning of contaminants.

5. Fuel System Damage and Leaks

AdBlue is corrosive to certain metals and rubber components in the fuel system. Over time, contamination can cause fuel pump failure, clogged injectors, or damaged fuel lines. You might notice fuel leaks or a strong ammonia-like smell near the fuel tank.

How AdBlue Contamination Happens

Understanding how AdBlue gets into the diesel tank helps prevent this costly mistake.

• Refueling Error: The most common cause is accidentally filling the diesel tank with AdBlue instead of diesel. This can happen at fuel stations where AdBlue and diesel pumps are close together.

• Cross-Contamination: Using the same funnel or container for both fluids without proper cleaning can transfer AdBlue into the diesel tank.

• Faulty Equipment: Malfunctioning or mislabeled fuel pumps can dispense the wrong fluid.

  
  

What to Do If You Suspect AdBlue Contamination

If you notice any of the symptoms above after refueling, take immediate action to minimize damage.

Stop Driving the Vehicle

Continuing to drive with contaminated fuel can cause severe engine and fuel system damage. Turn off the engine as soon as it is safe to do so.

Do Not Attempt to Add More Fuel

Adding more diesel will not dilute the AdBlue enough to prevent damage. It is better to address the contamination directly.

Contact our Professional Wrong Fuel Drain Service in Suffolk

We can come to you and drain and flush the entire fuel system and inspect for damage.

0330 122 6640

https://www.misfuelledcarfixer-suffolk.co.uk

Inform the Fuel Station

If the contamination happened at a fuel station, report the incident. They may need to check their pumps and prevent further issues for other customers.

Preventing AdBlue Contamination in the Future

Avoiding contamination requires awareness and careful handling.

• Know Your Vehicle: Familiarize yourself with the location and appearance of the diesel and AdBlue filler caps.

• Label Caps Clearly: If possible, label the caps or use color-coded covers to distinguish between the two tanks.

• Refuel Carefully: Always double-check the pump before refueling. Take your time and avoid distractions.

• Use Separate Equipment: Never use the same funnel or container for AdBlue and diesel.

• Educate Drivers: If multiple people use the vehicle, ensure everyone understands the difference between AdBlue and diesel.

  
  

The Cost of Ignoring AdBlue Contamination

Ignoring the signs of contamination can lead to expensive repairs. Fuel system components like injectors and pumps may need replacement. The SCR system can also suffer damage, leading to costly emissions repairs. In some cases, the engine may require a full rebuild.

Summary

AdBlue contamination in a diesel tank causes clear symptoms such as warning lights, starting problems, rough running, unusual exhaust smoke, and fuel system damage. Acting quickly by stopping the vehicle and seeking professional help can prevent severe damage. Careful refueling practices and awareness are the best ways to avoid this costly mistake.