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Troubleshooting AdBlue faults in Cambridge: Common problems and solutions

AdBlue delete Cambridge

To help meet EU guidelines on diesel vehicle exhaust emissions and to reduce the environmental impact of driving, Selective Catalytic Reduction (SCR) systems using AdBlue were introduced in late 2015. This pivotal technology works in conjunction with the more mature Exhaust Gas Recirculation (EGR) system technology, to combat harmful NOx pollutants. Understanding the function of SCR systems, common issues, and maintenance strategies is essential for drivers looking to avoid costly repairs. This is a must read article for anyone in Cambridge who wants to prevent or fix an AdBlue fault.


If you do already have an AdBlue fault in Cambridge, contact us to discuss an AdBlue delete* software solution at a fraction of the price of a conventional repair.



Troubleshooting AdBlue faults in Cambridge: What is SCR and AdBlue?

SCR systems are sophisticated emission control systems found in modern diesel vehicles. Utilising a liquid known as AdBlue, a urea-based solution, SCR systems reduce harmful nitrogen oxide (NOx) emissions. The principle is simple: AdBlue is injected into the exhaust stream, where it reacts with NOx gases produced during the combustion process, converting them into harmless nitrogen and water vapor. This transformation often occurs within the SCR catalyst, effectively reducing emissions without sacrificing performance or fuel economy.


Troubleshooting AdBlue faults in Cambridge: Common faults with SCR/AdBlue Systems.

Despite their effectiveness, AdBlue based SCR systems often encounter issues - largely due to crystallization of AdBlue fluid due to improper storage or extreme temperatures. Common faults include blocked or siezed AdBlue injectors, NOx sensor failures, AdBlue pump failures, AdBlue heater failures and AdBlue level sensor failures. When these faults occur, drivers may experience warning lights and messages on the dashboard, reduced engine power, or even a countdown to vehicle immobilization.


Troubleshooting AdBlue faults in Cambridge: Tips to minimize SCR/AdBlue problems.

  1. Regular AdBlue refills: Don't let your AdBlue tank run low! Keep AdBlue levels topped up, as the first symptom of an SCR system failure tends to be a low AdBlue warning.

  2. Quality AdBlue: Only use genuine AdBlue from reputable sources to avoid contamination and maintain proper SCR system function.

  3. Proper storage: Once purchased, store AdBlue in a cool, dry place away from direct sunlight to prevent crystallization. Avoid purchasing AdBlue from outlets such as petrol stations, that store AdBlue outside in the sun or cold.

  4. Correct usage: Use the entire bottle, and do not store unused AdBlue in the bottle. If you have surplus AdBlue after a top up, dispose of it responsibly rather than use it later on.

  5. Scheduled maintenance: Adhere to manufacturer-recommended maintenance schedules for SCR/AdBlue systems to catch issues early.

  6. Avoid mixing: Never mix different brands of AdBlue, and definitely do not mix it with other substances like diesel fuel.

  7. Additives: Drivers have reported some success at postponing expensive repairs through the use of AdBlue additives. However, the evidence is not conclusive that additives prevent crystallization and avoid AdBlue system failures.


Troubleshooting AdBlue faults in Cambridge: Typical repairs and costs

When AdBlue SCR system faults occur, repairs tend to be numerous and very expensive. Common repairs include replacing AdBlue injectors, NOx sensors, the tank assemnly or the SCR catalyst itself. It is not uncommon for AdBlue repairs to exceed £1,000 if using genuine parts. A Peugeot AdBlue tank replacement is around £2,000 plus fitting!


We often see AdBlue faults happen one after another; perhaps a NOx sensor fails followed by an injector shortly after. Drivers frequently experience multiple expensive repairs before the SCR system becomes an uneconomical repair. Rather than waste money, many drivers opt to request an AdBlue delete in Cambridge, as a quick and cost effective solution.


Troubleshooting AdBlue faults in Cambridge: Conclusion

SCR systems utilising AdBlue play a crucial role in reducing diesel emissions and promoting cleaner air. By understanding how these systems work, being aware of common faults, and implementing simple maintenance tips, drivers can minimise the risk of experiencing SCR/AdBlue problems. And in the event of issues, a conventional parts replacement repair or an AdBlue delete* can be undertaken to resolve the faults.



*Modifying a vehicle's factory fitted AdBlue system is not permitted on UK/EU highways. Solutions such as AdBlue deletes are for off-road use only, and are used solely at the owners risk.




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