Be sure to check the arm linkage from the Inlet Actuator on the Intakes, if there is play it will result in the butterfly's not opening and closing properly, thus it will throw a code. With that many miles I would replace the intake manifolds and a new oil cooler. The cooler runs $160 and the intakes about $1300 for the pair and the comes with a new actuator. Europarts SD has all the parts you need. Also the intakes come off together, be careful to hold them carefully when you remove them. The crossover will hold them fairly well but can come loose. I have a set of Intake Manifolds that has about 1/8" of play on the arms and that was enough to throw a code. Be sure to replace the square clips that hold the actuator arms too. It's just not worth doing all that work all over again. I've heard of a kit to rebuild them but I have yet to see one. Anyone else know where to find a kit? Hope this helps, DanI ordered new gaskets for the turbo and intake today. Saving 2 grand, time to celebrate! Can't b any more challenging than a 911 rebuild.