TF with MIL code - PO340

MIL has come on with me a couple of times now, first time it had cleared by the time we got the computer on it and no code was found, but it appeared again today & I was able to pull a code from the eBay Bluetooth scanner I bought last week.



It's showing a Pending Fault of PO340 which Torque (OBDII reader software) suggests is either camshaft sensor A or a misfire.



In the forums experience, what would be the most likely cause? I'm planning to get plugs & leads changed shortly anyway, but is the sensor a likely contender too?

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