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This $20 device told me exactly what was wrong with my car

A p0440 error code can mean several different things, ranging from a loose gas tank cap to a major emissions leak, a bad ...
Hot Rod

What Is an OBD2 Scanner and How Does It Work?

Your check engine light can come on a host of reasons, ranging from a loose gas cap to a faulty engine component. If you see a light illuminated on your dashboard, you can use an OBD2 scanner to ...