I spent an hour and a half this morning dealing with an engine failure light on my car. Since I just got it back from having a repair done yesterday, the warning light ("Engine malfunction! Get to a dealer!") did not make me happy.
It turned out, the repair had completed a job started on a sensor wire previously by...rodents. And apparently, I'm not alone:
NBC 5 Responds found consumers nationwide who say they’ve experienced rodent-damages wires in several carmaker brands. It’s a problem so widespread, carmaker Honda now sells a tape aimed at deterring rodents from nibbling on wires. The tape, which mechanics can wrap over existing wires, is infused with capsaicin, the ingredient in spicy peppers. Honda calls the issue “an age-old” problem, and the tape a good solution for customers who live in areas where rodents like to nest in vehicles.
My car's manufacturer doesn't use soy-based insulation like Toyota does. Instead, they use peanut oil lubricants, which are just as yummy to area vermin.
Since I discovered the damage right after the shop last touched the engine, they fixed the broken wire for free.