In my experience with teens (having been one and having raised two, and adding friends into the mix), I’ve found that often a common factor for teens who lie is having unusually strict, overcontrolling, overbearing parents. I don’t mean parents with normal expectations for safety and respect for others and for property. I mean parents who micromanage, shame, and fail to trust even when their kid isn’t doing anything wrong. Parents who care more about barking out orders than establishing a relationship. (Parents who wonder why the kid moves far away and wants little to do with them once they grow up.)
Just my observations. YMMV.