Mazda Repair Questions? Ask Mechanics for Answers ASAP
Hi, most failures of the VTC system on these cars are either a faulty vacuum pipe or VTC solenoid.
This question has already been covered in depth on here before, I include a link to the other experts write up, this is their effort and not mine.
I would maybe show this to your mechanic, this should guide him enough to effect a repair.
I hope this helps you get it sorted.