The Zafira i have in logs cmp sensor code even when i've scoped it to death both at sensor and ecu. its perfect when its running rough but i can catch it occassionaly dropping out the signal where as the +/- stay intact.

Had the ecu run tested and has passed. I also get ckp sensor codes sometimes if the car doesn't always fire but this will change to cmp sensor once it runs.

I'll add an image of both when the signal drops out and when its good later.