The message went away and all appeared normal after restart, but it came up four times during the weekend so I thought it would be better to be safe than sorry and decided to replace both EGR's. Reason for change was that it had got into fault mode and displayed "Engine systems fault" on our last weekend laning trip.
I also chosen to replaced a few inlet hoses and a couple of O-rings, I think this is worthwhile when you already have to release these for access. Darkside Developments accepts no responsibility for the use of this part on the public highway where removal of emission controls is prohibited.Beware this is a very image intensive post, 100+ images and steps to replace both EGR valves on a 3.6 TDV8. It is the customers responsibility to ensure they comply with rules and laws relating to their home country. Vehicles with the DPF removed will fail an MOT. In the UK it is illegal to remove any of the original emissions equipment fitted to a vehicle from the factory. The EGR Valve should NOT be removed on vehicles that still have the DPF Filter in place, doing so may block the DPF as the EGR Valve operation is a prerequisite for DPF Regeneration.
We can remove this by reprogramming the EGR software on the ECU. Once the valve is either removed or blanked off the vehicles ECU will no longer get a signal from the EGR Valve causing the emissions workshop light to appear on the dash board. If this is the case we can still remove the EGR using blanking plates or in some vehicles changing the inlet manifold allowing fitment of our EGR Delete Race Pipe Kits. Some cars may have a different EGR Valves or ones that are built into the inlet manifold. The first way is by using one of our EGR Delete Race Pipe Kits, these can be found on our website here: There are two ways of removing the EGR System from the vehicle. P1495 Switch-Over Valve for EGR Cooler (N345).Flashing Glow Plug Light (Later Common Rail Engines).Engine Management Light (Later Common Rail Engines).P048C - Exhaust Pressure Control Valve "A" Position Sensor/Switch Circuit Range/Performance.P048B - Exhaust Pressure Control Valve "A" Position Sensor/Switch Circuit.P048A/001162 - Exhaust Pressure Control Valve 1: Stuck Closed.P0477 - Exhaust Pressure Control Valve "A" Low.P047F/001151 - Exhaust Pressure Control Valve: Stuck Open.Other Tools (SnapOn etc) may give the following codes: 16786/P0402/001026 - Exhaust Gas Recirculation (EGR): Excessive Flow.16785/P0401/001025 - Exhaust Gas Recirculation (EGR) System: Insufficient Flow Detected.There are multiple faults codes and symptoms that can point towards a faulty / blocked EGR Valve and Cooler When these fail, fault codes and warning lights may also be triggered. Later model Common Rail Engines have flaps and solenoids on the Coolers, as well as sensors to monitor its operation. These are known for cracking which normally results in coolant loss. This is done to keep the inlet air temperatures as low as possible. The EGR Cooler is designed to lower the temperature of the exhaust gases before they are recirculated back into the engine. This build up in the valve is often what causes them to fail. 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. The problem lies with the exhaust gas that contain carbon deposits. 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.