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The EGR valve works by recirculating a measured amount of the exhaust gases back into the engine through the air intake system, reducing the amount of emissions the engine produces.

The problem lies with the exhaust gas that contain carbon deposits. This gas is constantly being recirculated through the engine, which over time will cause a build-up of the carbon deposits in the intake manifold and other parts including the EGR valve. This build up in the valve is often what causes them to fail.  What is an EGR Cooler? The EGR Cooler is designed to lower the temperature of the exhaust gases before they are recirculated back into the engine. This is done to keep the inlet air temperatures as low as possible. These are known for cracking which normally results in coolant loss. Later model Common Rail Engines have flaps and solenoids on the Coolers, as well as sensors to monitor its operation. When these fail, fault codes and warning lights may also be triggered.

AdBlue is a chemical liquid used in Selective Catalytic Reduction (SCR) on diesel vehicles in order to reduce NOx levels. The AdBlue fluid (urea and demineralized water) is injected into the exhaust system just before the SCR catalyst. The introduction of AdBlue into the exhaust gasses generates a chemical reaction inside the SCR Cat which results in NOx being converted into Nitrogen and Water Vapor. AdBlue was introduced by vehicle manufacturers in order to hit the stringent emission targets set out by governmental bodies. AdBlue is sometimes referred to as DEF (Diesel Exhaust Fluid).

Our AdBlue delete service will electronically disable the AdBlue system along with removing the associated dashboard lights and warning messages. Disabling the AdBlue system is normally completed by reprogramming the engine management system, however some vehicles will require a small electronic unit to be hardwired into the vehicle.

Is your vehicle suffering from DPF/EGR/AdBlue issues?

Get in contact with us today for a quote!


Nick Wilson

 "Really happy with the remap on my Audi A3 2.0tdi. Runs perfectly with the extra 48bhp increase. Great after care service as Paul had to come back 3 times. I had a new turbo fitted and egr removed, so he had to change the software and remap the car at no extra cost!! He didn't leave until it was running perfect. Would highly recommend. Thanks again, Paul 👍" 


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