I just put in a new tranny in this van and while I had the shop who rebuilt the tranny checking it on the computer he was getting error code 43. I found this-->y ou are getting a code 43 so you either have a faulty knock sensor, faulty ESC controller, or faulty ECM. My question is where will I find the first 2 items on this engine? I would start with them as the ecm will probably be the most expensive. Any help would be great! Thank's!