Then located the snow flakes valve, carefully undo the electric connector and unsnap the heat shield wrapped around it (I might have that backwards. Undo the clamps at each end of the valve. You might have to wiggle gently the rear exhaust pipe to slip the valve out. Rinse, repeat. How to clean an EGR valve | Tips from AUTODOCPoor quality fuel, oil in the engine combustion chambers, and improper air–fuel mixing cause contamination of th Replacing requires draining coolant, removing the intercooler and then you remove the TB and EGR valve as assembly. Not clear if intercooler could just be unbolted, decoupled from TB and suspended, w/o requiring coolant flush. The EGR 2 is one below the turbo. They call it "erg cooler", as it is an entire assy with EGR valve built into it. But here it is in condensed form: 1) many owners of 2003-and-earlier TDIs have modified the EGR cycle using VAGCOM software. 2) some owners have removed the EGR completely and replaced it with a RacePipe. 3) some owners have disconnected the vacuum line that activates the EGR valve. **Check out the tools we used below. If the video was helpful, please give it a "thumbs up" and consider subscribing to the channel.**This video goes over ho Oct 8, 2021. #3. There are two independent EGR systems on the CKRA. I've not had to mess with either of them, and that DTC does really point to either in particular. I think they use both systems in tandem, depending on load, coolant temp, etc. and so long as the end result is OK all is good. The DTC specifically is for "EGR fuel adaptation If the vehicle has fault P2457 check the inlet and outlet side temperature of the EGR cooler and the heater core. If there is a substantial difference in temperature perform the cooling system cleaning procedure. Cooling system cleaning procedure: In order to restore the cooling system to normal specification the coolant must be removed with the A failed EGR valve will often have no noticeable symptoms beyond a check engine light, but it does cause your 2014 Volkswagen Passat to operate inefficiently and produce higher emissions. Our technicians have access to manufacturer-approved repair processes and Volkswagen genuine parts. 208 people have looked at this part recently. Symptoms Limp mode on uphills 00665 Boost pressure regulation control range not reached P0299Part no 03L198716LVolkswagenPassat2.0 TDI CREngine code: CBDC(3C Urmareste-ma si pe: Facebook: 2vRE.