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Originally Posted by osudoc11
I have checked all the connections I can see and everything seems to be fine. I am getting signal from the cam position sensors and to the OCV's when I data log. I would think if something were loose then I would see interruptions in signals. Is the P0018 pretty specific for the driver side intake cam? With these complex systems now-a-days is it possible one of the others is messed up and it is just throwing that code? I put the header on myself and the 02 sensors are down near the passenger exhaust cam. If I dislodged or damaged anything I would suspect it would be around that.
Thanks for all of your help by the way. This is an extremely frustrating issue for me. I spend a lot of money and time to make my car the way I want it and now it is turning against me.
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the 02 sensor wiring or sensor faults would cause different codes. like P0420, but in tuned roms they are disabled especially if rear 02 has been re-purposed as flex fuel sensor input.
Im not sure if P0018 is specific to a specific side, judging by the number of TSB and the complex diagnosis of these cam issues its appears very difficult to isolate the exact cause.
As I said previously I am not an expert on this fault, however its reasnobly common and I have read of several instances of similar faults. Dealers have often had cars for several days and had several attempts for fix these cam issues, often replacing multiple expensive assemblies including the ECU to correct the problem.
It fairly unusual in a 2015 model.
My suggestion would be to return the car to stock including ecu rom and return it for repair under warrantee (you did say it now exhibits the fault with stock rom tune I believe). It likely the fault may be in manufacturing tolerance if several components and the combined effect is the fault your seeing. These assemblies OCV, cam actuators/sprockets ECU ect are all expensive , too expensive to trial and error swaps on.
Its extremely unlikely that the problems are a result of your mods, but I would swap everything to stock just to avoid a hassle at dealer.