CEC does not have any "salary" criteria. If all your other documentation is good, it will not be an issue.
If you are applying for a work permit, an LMO may be negative if the salary is not in line with the average for your occupation and region.
If there is some doubt about your experience in a skilled occupation, a salary that is much lower than then norm for that occupation will not help. But by itself, a certain salary level is NOT a requirement.