EGR Intermittent Short to Plus Fault - with EGR delete!

I've got a BXE 1.9tdi Octavia, which has been remapped and had the EGR deleted by Shark Performance. Everything's been working fine for well over a year now, but today the EML light came on. I scanned the car with VCDS and found that there was a fault code for an intermittent short to plus from the EGR valve.

Am I right in thinking that an EGR delete is just a blanking plate and having the EGR mapped out of the ECU? In which case should this fault be showing? I've cleared it and it's gone, but I don't know how long before it'll come back. Perhaps I should have a poke around the wires near the EGR valve and see if anything is lose? I'm not too worried about the fault, but I hate it when the EML is on!