Among them is this replacement gas cap (31838), which is a direct-fit part you can buy for Chrysler, Dodge, and Jeep models, as well as some Nissan, Mitsubishi, and Subaru cars and SUVs.

While it might seem like a straightforward warning light to fix, seeing "Check Fuel Cap" on your dashboard could be a sign of ...

It may be possible to source a replacement gasket for some vehicles, but otherwise, a new cap is required — which could be a locking model to thwart gas thieves. Once the cap itself has been ...