power steering failure

last night while I am driving to my home by mistake I have driven on sever pothole, due to this my bushes were worn out badly and my power steering pump making a loud grinding noise while I slightly turn my wheel right or left here the main twist is that there was no leakage from rack and I have opened my power steering reservoir and found air bubbles in fluid , I was dam sure concluded that there was some thing fault with my pump not with power steering rack , so some one please tell me whats wrong with my car, glowplug indication and check engine indication are coming with this insident can any one help me what to do now ????????????????