the engine of my pathfinder sometimes vibrates when i start d engine on 2005 Nissan Pathfinder

after drivin for few minutes or reving d engine d operation of d engine normalises. this has been goin on for about 2 months nd hav covered 1500 km since d problem started. my mechanic said that his portable detector detected random engine misfire. anoda mechanic said left camshaft. recently d supplementry airbag warnin sign started blinkin. what is d real problem nd what are d dangers of drivin it around. thnks

Asked by for the 2005 Nissan Pathfinder
could be either issue,hard to determine without insp of veh.