The Peugeot 508 is a stylish and sophisticated car, but like any vehicle, it can experience its share of issues. One common problem that Peugeot 508 owners may encounter is a “AdBlue system fault” message on their dashboard. This error message indicates a problem with the AdBlue system, which is a crucial component of modern diesel engines.
AdBlue is a urea-based solution that helps reduce harmful nitrogen oxide (NOx) emissions from the exhaust. When the AdBlue system malfunctions, it can prevent the engine from operating properly and may even lead to costly repairs.
If you’re facing an AdBlue error on your Peugeot 508, don’t panic! This article will provide a comprehensive guide to understanding the problem, troubleshooting common AdBlue issues, and resetting the system if necessary.
What is AdBlue and How Does it Work?
AdBlue is a non-toxic, colorless, and odorless solution that is injected into the exhaust system of diesel vehicles. When the AdBlue solution is injected, it breaks down into ammonia and carbon dioxide. Ammonia then reacts with NOx in the exhaust, converting it into harmless nitrogen and water vapor.
The AdBlue system in your Peugeot 508 consists of several key components:
- AdBlue tank: This tank holds the AdBlue solution.
- AdBlue pump: This pump delivers the AdBlue solution to the exhaust system.
- AdBlue injector: This injector sprays the AdBlue solution into the exhaust stream.
- AdBlue sensors: These sensors monitor the level and quality of the AdBlue in the tank.
- Control unit: This unit manages the entire AdBlue system, monitoring its operation and triggering warning lights or messages if necessary.
Common AdBlue Problems in Peugeot 508
The AdBlue system in your Peugeot 508 can experience a variety of problems, leading to the “AdBlue system fault” message. Here are some of the most common issues:
- Low AdBlue level: The most common reason for an AdBlue system fault is simply a low AdBlue level in the tank. The warning light will usually come on when the AdBlue level drops below a certain threshold, typically around 10-15%.
- AdBlue pump failure: The AdBlue pump can fail due to wear and tear, blockage, or electrical problems. A faulty pump may prevent the AdBlue solution from being delivered to the exhaust system properly.
- AdBlue injector failure: Similar to the pump, the injector can also fail due to various reasons, including wear and tear, blockage, or electrical problems. A faulty injector may not be able to spray the AdBlue solution into the exhaust stream effectively.
- AdBlue sensor malfunction: The AdBlue sensors can sometimes become faulty, providing inaccurate readings to the control unit. This can lead to false warnings or messages regarding the AdBlue system.
- AdBlue quality issue: If you’ve used AdBlue from an unknown source or if the AdBlue has been contaminated, it may not be compatible with your Peugeot 508’s system. This can lead to problems with the AdBlue system, triggering the fault message.
How to Troubleshoot AdBlue Problems in Peugeot 508
Here’s a step-by-step guide to troubleshooting AdBlue issues in your Peugeot 508:
- Check the AdBlue level: The first step is to check the AdBlue level in your tank. You can usually check this on the dashboard display or by opening the AdBlue tank lid. If the AdBlue level is low, simply top up the tank with genuine AdBlue solution.
- Inspect the AdBlue tank and lines: If you have a low AdBlue level even after topping up the tank, there might be a leak in the AdBlue tank or lines. Check for any visible leaks or damage to the tank and lines.
- Check the AdBlue pump: You can test the AdBlue pump by listening for its operation when you turn the ignition key on. If you can’t hear the pump running, it may be faulty.
- Check the AdBlue injector: Inspect the AdBlue injector for any visible damage or blockage. A clogged injector can prevent the AdBlue solution from being sprayed properly.
- Check the AdBlue sensors: If you suspect a faulty AdBlue sensor, you’ll need to use a diagnostic tool to check the sensor readings. A professional mechanic or dealership can help with this step.
- Check the AdBlue quality: If you’ve used AdBlue from an unknown source, there’s a chance that it’s not compatible with your Peugeot 508’s system. Use only genuine AdBlue solution from reputable brands.
How to Reset the AdBlue System in Peugeot 508
If you’ve successfully addressed the underlying AdBlue problem, you may need to reset the system to clear the fault message. However, it’s important to note that resetting the AdBlue system without addressing the root cause can mask the problem, potentially leading to further complications in the future.
Here’s how you can reset the AdBlue system in your Peugeot 508:
- Use a diagnostic tool: The easiest way to reset the AdBlue system is to use a diagnostic tool. A professional mechanic or dealership can use a diagnostic tool to clear the fault code and reset the system.
- Manual reset (if applicable): In some cases, you may be able to reset the AdBlue system manually. Consult your vehicle’s owner’s manual or contact your Peugeot dealership for specific instructions.
Common Questions about Peugeot 508 AdBlue Reset
Q: How often should I top up my AdBlue tank?
A: The frequency of AdBlue refills depends on your driving habits and the size of your AdBlue tank. However, you should generally refill the tank when the warning light comes on or when the AdBlue level drops below 25%.
Q: Can I use regular DEF fluid instead of AdBlue?
A: No, you should only use genuine AdBlue solution in your Peugeot 508. DEF fluid is a different type of urea solution designed for different types of vehicles.
Q: Can I reset the AdBlue system myself?
A: While it is possible to reset the AdBlue system manually in some cases, it’s generally recommended to take your vehicle to a professional mechanic or dealership for a proper diagnosis and reset.
Q: What happens if I ignore the AdBlue warning light?
A: Ignoring the AdBlue warning light can lead to serious problems, including:
- Reduced engine performance: The engine may lose power or start to run rough.
- Engine damage: The AdBlue system is essential for reducing harmful emissions, and a malfunctioning system can lead to engine damage.
- Costly repairs: If you wait too long to address the AdBlue problem, it can lead to more complex and expensive repairs.
Q: How much does it cost to fix an AdBlue problem?
A: The cost of fixing an AdBlue problem can vary depending on the severity of the issue and the required repairs. A simple AdBlue refill can be done for a few dollars, while a faulty pump or injector replacement can cost hundreds or even thousands of dollars.
Q: Is it possible to disable the AdBlue system?
A: It’s not recommended to disable the AdBlue system in your Peugeot 508. Disabling the AdBlue system can lead to increased emissions, potential engine damage, and may violate local emission regulations.
Conclusion
An AdBlue system fault on your Peugeot 508 can be a frustrating experience. However, by understanding the problem, troubleshooting the common issues, and resetting the system correctly, you can address the issue and get back on the road quickly.
Remember, if you’re unsure about any aspect of your AdBlue system, it’s always best to consult a qualified mechanic or your Peugeot dealership.
By addressing your AdBlue concerns promptly, you can keep your Peugeot 508 running smoothly and enjoy a comfortable and safe driving experience.
