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code p 1340 refers to crank position sensor and camshaft position sensor signals out of sequence
the results of the pretest smog test at 2400 rpm suggest that the cam advance solenoid or system is failing
that will alter the sequence of the signals resulting in the code and failing of the smog test
as to answer you question , I am not convinced at this point but I consider the cam advance system to be at fault and would be testing in that area
I doubt it as you have stated that it shows a calibration fault . This will be from the variable valve timing assembly on the cam shaft/s that is altering the valve timing. The timing chain may be faulty but you should be hearing it to be that bad.