Creator OBD2 reads: 00, 001, 48, 73 No Found! - Is this a Fault Code?

[JgrX]

Originally Posted by ingenieur

BMW fault: 4873 Exhaust gas recirculation cooling, plausibility - fault is due to an error in monitoring EGR cooler bypass flap.
1. Check the vacuum supply to the exhaust gas recirculation cooler bypass flap (vacuum lines and changeover valve).

2. If the vacuum supply is OK:

Replace the exhaust gas recirculation cooler (throttle return spring of bypass flap may be faulty).

I have the 2010 35d as well and now have the same fault code. I do not see any soot or cracks on the EGR cooler. Excuse my ignorance but how do you perform #1 - Check the vacuum supply to the exhaust gas recirculation cooler bypass flap (vacuum lines and changeover valve). Can anyone direct me to the part # to be replaced on realoem site?

Thanks guys