Hey there I have a 2004 ford ranger 4.0 v6 5speed manual 4x4. Well my truck throgh two codes 171 & 174 anf foubd oht that the intake manifild had a leak so I replaced that and now the truck throght like 9 other codes saying that all the o2 sensors are stuck and the egr ud bad so i replaced the egr and the o2 sensors and its still throwing the 9 same codes so I'm kind of stumped about it So I'm just wondering if any one has had the same problem