Before I figured out how to work on cars, onboard computer systems scared me. I’ve had no formal training, after all, so the idea of a car’s complex electricals and countless sensors made DIY work ...

️ Editor's note: This product category requires new testing about once a year. We'll update this article with the most recent information when it's available. Modern cars are technological marvels, ...

Most of us cringe in fear when the check engine light in the dashboard of a modern 4x4 is tripped on. Your mind begins to spin in frustration wondering what could have triggered it, how bad it really ...

We've all been there—that pesky check engine light pops up on your dashboard. Instantly, thoughts of expensive mechanic bills, weeks of it being repaired in the garage, and inconveniences galore flash ...

If you’re not sure which OBD2 code reader to buy, we've found the perfect one for you at Walmart. Right now, the bestselling ...

There's nothing more intimidating for many drivers than to find a warning error light appear on your vehicle dashboard. While some may be confident in their ability ...

In the Last diagnostics article, we outlined how to retrieve and decipher engine diagnostics for engines running OBD-I engine management computers. OBD or On Board Diagnostics is a subsystem of the ...

The Check Engine Light (CEL) happens when there is an issue. If you clear it manually, it may keep returning until the ...

Onboard diagnostics (OBD) systems have been around since the 1980s and were developed to help limit harmful automotive exhaust emissions. Between 1988 and 1995, U.S.-built vehicles came with what's ...

If you're a fan of diesel-powered trucks, chances are you've heard of Cummins engines. Although Cummins engines can be found in everything from commercial trucks to boats and mining equipment, the ...