It happens at the worst time - stuck in traffic or a long road trip - when you see that check engine light flick on. Here's why it may keep returning.

From simple engine code readers that can help you double-check a mechanic’s diagnosis, to more sophisticated devices that track your driving or let you fine-tune your car’s performance, here ...

Basic engine code readers for detecting engine problems only Multi-system scan tools for inspecting systems besides the engine, such as the transmission and ABS ...

From simple engine code readers that can help you double-check a mechanic's diagnosis, to more sophisticated devices that track your driving or let you fine-tune your car's performance, here are ...