Asking to borrow a code reader from AutoZone is like asking to borrow a cup of sugar from your neighbor. It’s a nice gesture, and if they’re able to help you out, they will. However, if they don’t have one to spare or can’t get to it, they’re not going to be too thrilled.
The best way to avoid any awkwardness is to just buy your own code reader. They’re not too expensive and will save you a lot of hassle in the long run. Plus, it’s always good to have one on hand in case your car decides to throw a tantrum.