Present-day OBD is in fact a set of tools, codes, and procedures that allows the vehicle to determine if and what is wrong with itself, and then relay that info ...

The second character identifies whether the fault code is a generic code or a manufacturer specific code. A generic code is the same on all OBD-II equipped vehicles no matter the manufacturer.

The OBD (On-Board Diagnosis) system in your Toyota Corolla will enable you to see what’s wrong with it without going to the service if you choose the low-budget DIY way.

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.

How to get your OBD2 codes read at an auto parts store Many auto parts stores offer code readings as a free service. Advance Auto Parts, AutoZone, and O’Reilly are among the stores that will.