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

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 ...

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 ...

Car diagnostic tests scan a car’s components and integrated systems for errors or malfunctions before they become dangerous. These tests leverage computerization to keep your car in optimal working ...

If you want to stay up-to-date with the latest Rate My Car codes, bookmark this page (CTRL+D) and visit it often. We do our best to track down all the latest codes and place them here so you don’t ...

In the last Diagnostics episode, we outlined the vital information provided by compression and leakdown testing and illustrated how to use these most important tools. These tests reveal the internal ...

Used cars are a great way to save money on a new ride. However, there are downsides to buying a second-hand vehicle. If a deal sounds too good to be true, it’s likely an online car marketplace scammer ...