P1345 DTC mil is on all the time engine runs fine

How do I daiagnose this code?
Does anyone have a trouble tree available?
Truck is a 1996 K3500(4X4) vin J 7.4l (454ci)
Thanks in advance.
Gary K

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Gary,
That code is for the camshaft position sensor. Either the sensor is malfunctioning or it has detected an abnormal correlation between the camshaft and crankshaft position sensor. Seeing as how she's running ok, I'd wager it's just the camshaft position sensor puking out on ya.
How many miles?
Doc
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