It has been awhile but I changed out all the cylinders on my limited roadster and I seem to remember it would be hard to mix up sensor locations. The wire harnesses position the sensors where they need to be. I agree that there must be a sensor or hose reinstalled in the wrong position. I also think if any attention at all was paid during disassembly it would be hard to mix up hose connections. PTCM seems like a long shot and quite a coincidence.