In recent years, many Peugeots equipped with Euro 6 diesel engines have integrated the AdBlue system to reduce harmful emissions. However, models such as the Peugeot 208, 308, 3008, and 5008 are often subject to problems related to the SCR (Selective Catalytic Reduction) system. In this article, we focus primarily on the cost of repairing these faults , with helpful information for navigating the diagnosis, parts, and labor costs.
What is the AdBlue system and why can it fail?
AdBlue is a urea-based solution injected into exhaust gases to reduce nitrogen oxides (NOx). The system includes:
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AdBlue tank
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Pump and injector
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SCR control unit
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Upstream and downstream NOx sensors
When one of these elements fails, the car displays error messages such as:
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"Risk of engine stalling in 1,100 km"
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"Defective pollution control system"
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"AdBlue anomaly"
How much does it cost to repair an AdBlue problem on a Peugeot?
Costs vary depending on the component being replaced. Here's a detailed overview of the most common costs for the Peugeot 208, 308, 3008, and 5008:
| Component | Estimated cost (VAT and labor incl.) |
|---|---|
| NOx sensor | €350 - €700 |
| AdBlue pump | €600 - €1,200 |
| AdBlue injector | €150 - €400 |
| SCR control unit | €500 - €900 |
| OBD Diagnosis | €30 - €80 |
These costs can increase if there are multiple faulty components at the same time or if the repair requires a long labor time.
Most common faults and associated symptoms
NOx sensor faulty
Common error that can cause the car to stall or limit power.
Repair cost: €350 - €700
Defective AdBlue pump
If the pump does not create enough pressure, the system fails.
Replacement cost: €600 - €1,200
Clogged injector
Crystallization or contamination blocks the injection of AdBlue liquid.
Cleaning/replacement cost: €150 - €400
SCR control unit failure
The control unit may have bugs or permanent errors.
Replacement cost: €500 - €900
What to do when the AdBlue error appears
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Act now: Ignoring the message may cause the engine to stall.
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Perform an electronic diagnosis: Identify the faulty component exactly.
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Check the AdBlue level: A simple top-up can only solve the problem if the level is low.
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Consult a qualified mechanic: It is important to have experience with SCR systems.
Can you avoid the expense? Beware of illegal solutions.
Many try to disable the AdBlue system to avoid costs. Remember that it is illegal , carries fines, and prevents you from passing your vehicle's MOT.
Tips for preventing breakdowns (and saving money)
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Use only ISO 22241 certified AdBlue
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Top up completely to avoid residual concentrations
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Avoid long periods of car inactivity
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Perform periodic checks during service
Conclusion
The AdBlue system, while useful for reducing emissions, can represent a significant expense for Peugeot 208, 308, 3008, and 5008 owners. Knowing in advance what the average costs are for the components most prone to failure helps you make informed choices and take timely action.
To save on spare parts, you can rely on expert distributors like Autoricambi Tritella , which offers reliable and selected components with fast shipping throughout Italy.
