First of all, there are two O2 sensors. Next, a timing belt replacement will not address this issue. However, I would solve this problem prior to getting the timing belt replaced. I say that because when the timing belt is replaced, if the crankshaft position sensor is causing the problem and it could be, it is located in the area you open to replace the timing belt and would be much easier and cheaper in the long run.
I assume that it is random when the engine shuts off. When it is down and I assume it does not fire immediately after the shutdown. Maybe you could expand on that. This is the time to be doing the testing right after a shutdown.
Monday, April 28th, 2008 AT 9:02 AM