I'm not sure. they are dsms so anything is possible. I never got a code. I also don't think the egr detects flow. it only has two wires so it almost can't. It might go off manifold temp. If it read flow it should have 3 wires but I guess it is some crazy wiring set up they have right? And I might have a kinked vac line. the one from manifold to rear of car ( its a 99, evap all in fender) but need to check it out. Any one know where is goes to or how to see it from underneath?