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 ...

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On-board diagnostics (OBD-II) scanners, required in U.S. vehicles since 1996, have progressed from simple fault code readers to advanced systems capable of real-time data monitoring and, in some cases ...

This article was updated in November 2025 with new information. You know you’ve earned your DIY stripes when you can stay calm the moment something goes wrong. And with cars, that moment usually ...

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 ...

Code readers are diagnostic tools that every car owner should consider owning. Having one of these is as important as carrying a spare tire or a fire extinguisher in the trunk. Back in the day, before ...

Once limited to reading generic trouble codes, OBD2 scanners now range from inexpensive handhelds to advanced diesel diagnostic platforms. Modern tools can handle manufacturer-specific codes, ...

Car onboard diagnostic systems are very useful, but different brands have diverse error codes. Here's the difference between ...

Yet anyone can get an idea of the problem with a simple check using a tool that can cost less than a pub lunch. Most cars have an On Board Diagnostics (OBD) port, which allows you to plug in a device ...

We may receive a commission on purchases made from links. 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 ...

The Standard's journalism is supported by our readers. When you purchase through links on our site, we may earn an affiliate commission. Modern cars are great, except when they go wrong. The number of ...