Hello, everyone, I have recently have major work done on my Octavia VRS an replacement engine due major oil issues and after it was fitted I still kept getting EGR A Flow Insufficient so I have it it replaced as well as the cooler but I have noticed the DPF has been deleted unbeknownst to me I only got this car in May from a indep dealer and they have so far paid to have everything fixed but just seems to be having issues. Does anyone have any advise to why the error could be coming up after practically having everything replaced? My thoughts are ithe ECU hasn't been properly reset or something similar thanks in advance for any advise. 

I mean, the garage that done the work should know how to diagnose a fault without having to result to online forums!

 

But the EGR flow is monitored by the mass air flow sensor, first thing would be to see if the MAF value changes when the EGR valve is opened/closed. If it doesnt do anything you either have an air leak, the valve isnt moving or there is a blockage somewhere.

 

That would be where I start.