Computer problem
2001 Land Rover Discovery 2 V8 Four Wheel Drive Automatic 134000 miles

hi on my land rover i have a bunch of codes such as cam and crank sensor ive chanced all of them ma air flow some factory codes and a few others the car dose run but im afraid it will shut off again im just triying to get the check eng light off could it be the pcm also changed the alt thanks steve l