Peugeot Boxer Adblue Problems

For many vehicle owners, the AdBlue system is seen as a crucial part of reducing harmful emissions. However, for a number of Peugeot Boxer owners, this system has become more of a nightmare than a solution.

The Problem

A Peugeot Boxer owner shared his frustrating experience after purchasing a second-hand vehicle with 111,000 miles. Just two weeks post-purchase, he was greeted by the dreaded AdBlue light, paired with the check engine signal. Despite seeking the assistance of reputed Peugeot dealers in Croydon and later in Morden, London, the problem persisted. Both times the dealership was unable to determine the cause of the issue, even after system resets and AdBlue top-ups.

The recurring problem was not only the return of the warning lights but also the impending engine shutdown, which was indicated to occur after a mere 215 miles.

Possible Solutions

1. Nox Sensor: One master technician specializing in Peugeot suggested the problem could lie in the Nox sensor, an element known for frequent malfunctions. This sensor is a part of the vehicle’s emissions system and monitors the level of nitrogen oxides being emitted from the engine. Faulty readings from this sensor could trigger the AdBlue and check engine warnings.
2. System Flow Check: A system flow check requires removing the AdBlue injector and using Peugeot’s diagnostic tool to test all the components, ensuring the Nox in the exhaust is decreasing. This check is crucial as merely resetting the system without addressing the root cause will likely result in the problem resurfacing.
3. Particle Filter Replacement: The particle filter is another potential culprit. Over time, it can become overloaded, especially in vehicles with high mileage. If the system’s flow check determines the filter is the problem, replacement may be necessary, though this solution comes with a hefty price tag.
4. AdBlue and DPF Deletion: While this method is controversial and may not be legal in some jurisdictions, some owners have chosen to delete both the AdBlue and Diesel Particulate Filter (DPF) systems. This essentially removes the problematic components, preventing the issues from returning.
5. Filter Removal and System Readjustment: A more long-term solution that some owners have opted for is to remove the problematic filter and then adjust the vehicle’s computer system. This process can potentially reduce fuel consumption and increase power. However, owners should be aware of potential MOT challenges that may arise.

Conclusion

While Peugeot Boxer’s AdBlue problems can be daunting, there are several solutions available. However, the effectiveness and legality of each solution can vary. Owners should consult with experienced mechanics, preferably those familiar with Peugeot vehicles, to determine the best course of action. As always, staying informed and proactive is key to resolving such automotive challenges.