I'm getting these two codes. I understand they are both related to the icp. I put a new one in, still the same. New pigtail as well. All I can think is Hpop or ipr. I have a 15 Hpop since I have an e99 but I'm putting a 17* in this weekend. When I'm coasting down a hill my truck will throw a ses light and idles different. Once the light goes out the idle changes as well. Fuel pressure is good. So I'm thinking it's ipr, Hpop, or last resort....injectors. Any info is appreciated.