My sister got the car with an ISS code already on it. The guy had rebuilt the transmission before she got it. I went in there and replaced the ISS but that did not solve the issue. I think you're right, the reluctor wheel could be the culprit or is missing altogether (left it out by mistake?). Anyway, do you know if the valve body and channel plate can be removed as an assembly to get to the reluctor wheel (meaning without separating the valve body first from the channel plate)?