Adblue system malfunction service now. by Andyfish19 » Sat May 05, 2018 7:04 pm. My van is 2017 model and done 24000 miles, i service it myself but I have had the above light up on the dash. I have changed the oil again new filter, new fuel filter and also air filter. I have even drained out the ad blue and ripped it up with new. by me&myvan » Sun Aug 16, 2009 4:03 pm. The EGR valve (exhaust gas recirculation valve) does nothing more than introduce exhaust gases into the combustion process under certain conditions which has the effect of cooling the combustion process and contributing to less harmfull emissions. Most engines have them. No way will they remove tubing and look inside. Removing a cat or DPF is easily seen obviously but not the EGR. It will still pass emissions, not damage any other part including DPF. It only requires writing out in the map to ensure you don't get the EML warning on the dash or limp mode eventually. It's undoubtedly the reason we get a "flutter P0403: EGR→ Circuit Malfunction. A circuit malfunction implies that there is a wiring problem coming to or from the EGR system. That does not rule out the EGR solenoid itself. We’ll go into the most common symptoms and causes of P403 directly below. As far as the average do it yourselfer being able to diagnose the cause of this code, it can Common symptoms of this phenomenon include lumpy running when at idle, power loss and difficulty when faced with hills, as well as sometimes giving fluctuating readings of the temperature gauge. These issues can often by misdiagnosed as a blocked air intake, turbo fault or EGR valve malfunction, when in fact it’s a faulty thermostat. 8 posts · Joined 2011. #7 · Jan 11, 2011. I cleaned the EGR valve out on my 2.0 TDCI Mondeo 54 plate 27k miles. Was quite choked up. Car pulls much better and is more responsive. Judder is still there at around 1500 - 1800 rpm. I shall go through the above and check the pipes next for splits or holes. Great car otherwise, if I can't get to Hi, Ive got a 58 plate Transit 100 T350 2.4 RWD, always surged a little at idle but not been a problem. Other day it cut out at approach to roundabout when I pressed the clutch. Started back up ok first time, but then cut out at every junction all the way home. Ford Transit Custom. £281. Get exact price. Average costs for 9 models not shown due to insufficient data. Show ∨. Estimates on average repair costs, such as the above results for an egr valve replacement, are based on ClickMechanic's quote data which combines multiple third-party sources. Actual costs may vary. TyXkby3.