What to Do If You Accidentally Put 1 Litre AdBlue in Your Diesel Tank
- Wrong Fuel Emergency
- Feb 25
- 4 min read
Updated: Feb 28
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Accidentally putting AdBlue into a diesel tank can cause serious problems for your vehicle. If you find yourself in this situation, acting quickly and correctly can save you from costly repairs and extended downtime. This guide explains what AdBlue is, why it should never go into a diesel tank, and the steps you should take if this mistake happens.
What to Do If You Accidentally Put 1 Litre AdBlue in Your Diesel Tank
AdBlue is a liquid solution made of urea and deionized water. It is used in diesel vehicles equipped with Selective Catalytic Reduction (SCR) systems to reduce harmful nitrogen oxide emissions. AdBlue is stored in a separate tank and injected into the exhaust system, not the fuel tank.
Putting AdBlue into the diesel tank causes contamination because:
AdBlue is not a fuel and does not combust.
It can cause corrosion and damage to the fuel system components.
It may clog fuel filters and injectors.
It can lead to engine failure if the vehicle is started with AdBlue in the fuel tank.
Understanding this difference is crucial to avoid costly mistakes.
Signs You May Have Put AdBlue in the Diesel Tank
Sometimes, the error is obvious, but other times it might go unnoticed until symptoms appear. Common signs include:
Difficulty starting the engine or failure to start.
Unusual noises from the engine.
Warning lights on the dashboard related to the fuel system.
Reduced engine performance or stalling.
Strong chemical smell from the fuel tank area.
If you notice any of these signs after refueling, suspect contamination immediately.
Immediate Steps to Take If You Put AdBlue in Your Diesel Tank
Time is critical when dealing with AdBlue contamination. Follow these steps:
Do Not Start the Engine
Starting the engine will circulate the contaminated fuel, increasing damage.
Contact a Wrong Fuel Emergency Service
Call a professional service immediately. For example, you can reach out to the emergency number 07771 029122 for expert assistance.
Inform the Service About the Situation
Provide details such as the amount of AdBlue added (e.g., 1 litre), vehicle make and model, and any symptoms noticed.
Wait for Professional Help
Do not attempt to drive or fix the problem yourself. Professionals have the right tools to drain and clean the fuel system safely.
What Professionals Do to Fix AdBlue Contamination
When the emergency service arrives, they will typically:
Drain the entire fuel tank to remove all contaminated fuel.
Flush the fuel lines and filters to clear any residue.
Check fuel injectors and other components for damage.
Refill the tank with clean diesel fuel.
Test the vehicle to ensure it runs properly.
This process prevents long-term damage and restores vehicle performance.
How to Avoid Putting AdBlue in the Diesel Tank
Preventing this mistake is easier than fixing it. Here are some tips:
Always double-check the fuel type before refueling.
Familiarize yourself with your vehicle’s AdBlue tank location and appearance.
Use different fuel stations or pumps if possible to reduce confusion.
Label your fuel cap or AdBlue tank cap clearly.
Educate anyone else who may refuel your vehicle about the difference.
What Happens If You Start the Engine with AdBlue in the Diesel Tank
Starting the engine with AdBlue in the diesel tank can cause:
Immediate damage to the fuel pump and injectors.
Corrosion inside the fuel tank and lines.
Clogging of fuel filters leading to poor fuel flow.
Engine misfires or complete failure.
If this happens, the repair cost can increase significantly, and the vehicle may be out of service for days.
How Much Damage Can 1 Litre of AdBlue Cause?
Even a small amount like 1 litre of AdBlue in a diesel tank can cause problems. Diesel tanks usually hold tens of litres, so the contamination level depends on the total fuel volume. However, because AdBlue is corrosive and not compatible with diesel, even small quantities can:
Corrode metal parts inside the tank.
Damage sensitive fuel system components.
Lead to costly repairs if not addressed quickly.
The key is to act fast and avoid running the engine.
When to Call for Emergency Help
If you realize you have put AdBlue into the diesel tank, call emergency services immediately. The number 07771 029122 connects you to a wrong fuel emergency team that can provide:
Quick advice on what to do next.
On-site fuel draining and cleaning.
Preventive measures to protect your vehicle.
Delaying the call can worsen the damage and increase repair costs.
Cost Implications of AdBlue Contamination
Repairing a diesel vehicle after AdBlue contamination can be expensive. Costs vary depending on:
How much AdBlue was added.
Whether the engine was started.
The extent of damage to fuel system components.
Typical costs include:
Fuel tank draining and cleaning: £150–£300
Fuel filter replacement: £50–£150
Injector cleaning or replacement: £200–£600
Fuel pump repair or replacement: £300–£800
Prompt action can reduce these costs significantly.
Final Advice for Diesel Vehicle Owners
Mistakes happen, but knowing what to do can save you time and money. Remember:
Never put AdBlue in the diesel tank.
If you do, do not start the engine.
Call a wrong fuel emergency service immediately at 07771 029122.
Follow professional advice and let experts handle the cleanup.
Take preventive steps to avoid future mistakes.
Your diesel vehicle depends on clean fuel to run smoothly. Protect it by acting quickly and responsibly.
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