[Justin] tipped us about his slick custom OBD-II gauge that could easily pass for an OEM module. He was able to use the clock area of his Subaru BRZ to display a bunch of information including the ...

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.

Check out how to read OBD-II engine codes and learn what they all mean. Get all the details here in this month's issue of Turbo & High-Tech Performance.

If your vehicle check engine light is illuminated, you can access the OBD-II port with a proper scanner and, odds are, it can give you a code that indicates where the issue is located.

Plus, it has a more straightforward and standard user operation, meaning it now uses the same OBD-II port, connector, and diagnostic trouble codes for all car makes.

Instead of paying a tech to plug an OBD-II scanner into your car and tell you what's wrong with it, you can take a look at the codes first—if you have the right OBD-II scanner.

Nearly all TTAC readers and writers have wrenched on a vehicle equipped with the OBD-II diagnostic system. Having a handheld code reader in yer box of tools can help douse that infernal check ...

Did your vehicle's check-engine light just pop on? An OBD-II scanner can provide some direction. We tested a handful to find ...

Already an affordable option, right now you can save over $25 on this diagnostic code reader from trusted brand Ancel.

This week's tool, the OBD-II monitor, can save your car in a moment of disaster. This recommendation comes our way from my own toolbox.