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What causes EGR valve failure?
The failure of the EGR valve on the vehicle is not out of the ordinary, as this issue can arise on most modern diesel engines. The failures are usually caused by a build-up of deposits in the EGR valve over a period of time that causes them to stick.
What is EGR in diesel engine?
Exhaust gas recirculation (EGR) is an emission control technology allowing significant NOx emission reductions from most types of diesel engines: from light-duty engines through medium- and heavy-duty engine applications right up to low-speed, two-stroke marine engines.
Does EGR effect Turbo?
The EGR valve is likely to stick and become coked up on some applications. BTN Turbo warns that this can have a significant effect on turbocharger performance. A faulty EGR valve can result in excessive carbon/soot at the turbine end, causing the VNT mechanism to stick.
How long can you drive with bad EGR?
Technically speaking, you can drive your vehicle with a bad EGR valve without any major limitations. You might experience shaking at idle, rough running, popping sound, and that’s about it. In some cases where the EGR valve is stuck completely open (which is super rare), you might not be able to start your vehicle.
What is an exhaust gas recirculation ( EGR ) valve?
What is an Exhaust Gas Recirculation (EGR) Valve? An Exhaust Gas Recirculation Valve, often referred to as an EGR valve is a mechanical flap designed to recirculate exhaust gasses back into the engine before they exit the exhaust into the atmosphere.
Why is EGR important to the p0401 code?
Usually on an OBD2 system that sets the P0401, the ECM/PCM must see the failure on two consecutive trips before it will permanently set the code and trigger the Check Engine Light. The EGR system is important because it reduces emissions by allowing burnt exhaust gas to flow back into the engine.
What happens if the EGR valve is stuck?
– If your EGR valve flap is stuck open or stuck shut, then this is possibly the reason why. Furthermore, the EGR valve system allows the leaking oil to pass up through the inlet system and into the inlet manifold and combustion chambers – where it shouldn’t be! – This will cause fluttering and loss of power as well as oil smoke.
Is the EGR valve required for the MOT?
No, the EGR valve system is not a requirement for the MOT. Removing the EGR can in fact improve carbon emissions of the vehicle so it could in actual fact help to improve the vehicles emissions providing the EGR Removal (EGR Delete)…