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Vauxhall Insignia AdBlue Warning: What It Means and How to Fix It

The “AdBlue warning” on your Vauxhall Insignia can be a frustrating problem. But before you panic, let’s understand what’s going on and how to tackle it.

What is AdBlue?

AdBlue is a diesel exhaust fluid (DEF) used in modern diesel vehicles to reduce harmful emissions. It’s a solution of urea and deionized water that is injected into the exhaust system, where it reacts with NOx (nitrogen oxides) and converts them into harmless nitrogen, oxygen, and water.

Why Does My Vauxhall Insignia Display an AdBlue Warning?

The AdBlue warning light on your Vauxhall Insignia indicates that there is a problem with the AdBlue system. This could be due to a few reasons:

  • Low AdBlue Level: This is the most common reason for the warning light. Your car’s AdBlue tank is running low, and needs to be refilled.
  • AdBlue Quality Issue: The AdBlue in your tank might be contaminated or of poor quality. This can cause the system to malfunction.
  • AdBlue System Malfunction: There could be a problem with the AdBlue sensor, pump, injector, or other components of the system.

How to Fix the AdBlue Warning in Your Vauxhall Insignia

Here’s what you can do depending on the reason for the warning:

1. Refill the AdBlue Tank

If the warning light is due to a low AdBlue level, simply refill the tank. You can buy AdBlue at most gas stations or automotive stores.



After refilling the tank, the warning light should go out within a few minutes.

2. Check the AdBlue Quality

If the warning light persists even after refilling the AdBlue tank, it could be due to a quality issue. Check the AdBlue you’re using:

  • Is it the right type of AdBlue? Ensure you’re using the correct AdBlue specifically designed for diesel vehicles.
  • Is it fresh and uncontaminated? Avoid using AdBlue that has been exposed to extreme temperatures or has been stored for a long time.

If you suspect the AdBlue quality is the issue, consider replacing it with a fresh batch of AdBlue from a reputable source.

3. Seek Professional Help

If the warning light persists or you suspect a problem with the AdBlue system, it’s best to seek professional help from a qualified mechanic or Vauxhall dealership.

“You should never try to fix a complex system like the AdBlue system yourself. It’s best to leave it to the professionals to avoid damaging the system further,” says [Expert Name], a renowned automotive technician.

Can I Reset the AdBlue Warning Light Myself?

You can reset the AdBlue warning light using the following steps, but this doesn’t address the underlying issue.

  1. Turn the ignition key to the “on” position without starting the engine.
  2. Press and hold the accelerator pedal to the floor for 10 seconds.
  3. Release the accelerator pedal and turn the ignition key to the “off” position.
  4. Repeat steps 1-3 three times.
  5. Turn the ignition key to the “on” position again and the warning light should reset.

What if I Ignore the AdBlue Warning?

Ignoring the AdBlue warning light can have serious consequences, including:

  • Reduced engine performance: The AdBlue system helps optimize engine performance, so a malfunction can lead to reduced power.
  • Increased emissions: Without AdBlue, your car will emit more harmful pollutants.
  • Damage to the exhaust system: In some cases, ignoring the AdBlue warning can lead to damage to the exhaust system.
  • Costly repairs: If the issue is left unchecked, you could end up with costly repairs in the future.

Vauxhall Insignia AdBlue Warning FAQ

Q: How often should I refill my AdBlue tank?
A: The AdBlue tank’s capacity varies between models, so the refill frequency depends on your driving habits. However, you should aim to refill it when the warning light comes on, or before the gauge indicates you’re nearing the empty mark.

Q: Can I use regular water instead of AdBlue?
A: No, regular water is not a suitable substitute for AdBlue. Using regular water will damage the AdBlue system and can lead to costly repairs.

Q: Can I add AdBlue to my diesel tank?
A: No, do not add AdBlue to your diesel tank. The two are incompatible and mixing them will cause damage to the engine.

Q: How much does AdBlue cost?
A: AdBlue prices vary depending on the retailer and the size of the container. However, it’s generally considered to be affordable compared to other automotive fluids.

Q: What should I do if my AdBlue warning light won’t go off even after refilling the tank?
A: If the warning light persists, it’s best to take your Vauxhall Insignia to a qualified mechanic or Vauxhall dealership for diagnosis and repair.