I have replaced both crankshaft position sensors and the cam sensor but still have a P0336 code come back after several miles of driving. I have not done a crankshaft variation relearn procedure and am curious if the relearn procedure would correct a P0336. No other codes are present. When I started the crankshaft code would clear on its on and return every few days. Thanks. I am also curious of an inexpensive scan tool that can do a relearn. I have autotap software currently which I have read can not do a Case relearn. Thanks Jeff.