The bad news is that a lot of the schools won't consider any courses done after your first undergrad degree was completed. Those that do: Alberta, Manitoba, UNB, Dal. Alberta and Dal take the last 2 years, so since it sounds like your last year was particularly rough, you might be looking at 2 full years of coursework to make yourself competitive, though a year of straight As might do depending on how bad that last year was.
If I were you, I might consider Manitoba and UNB, as they drop a number of your worst grades. Off the top of my head, I think Manitoba will drop your worst 30 credits, and UNB your worst 25%. If your GPA on Manitoba's scale after drops hits 3.6 (they're on a wonky 4.5 scale, so you should look it up), you can even go ahead and apply this year. Similarly for UNB, if you're able to hit around the mid-3s (on a 4.3 scale) with the drops.
Saskatchewan will take the best two years of your first undergrad degree, so that might work well for you too. Again, with a 162 I'd say it's worth applying if your best two years is around 3.4 or 3.5.
And since you're working now, there's always Calgary and Windsor, especially if you had extenuating circumstances that explain your low GPA and you can get some decent letters together.
It's definitely worth looking at any options you might have right now. Going back to school won't give you a whole lot more options (probably just Alberta and Dal) and obviously the opportunity cost is pretty high. Good luck!