The “check engine” light is the most annoying orange icon in America. Half the time the car feels fine, and the other half ...

Seeing your vehicle's check-engine light come on can throw a wrench in your travel plans. It can also feel a little scary: Does it mean your ride is headed for the scrapyard? Or is there a simple fix?

The automotive industry has a huge variety of OBD2 scanners that come in a wide range of price tags starting from less than $100 and going up as high as $10,000. This glut of options is probably the ...

In March 2022, within a broader-treatment post on automobile owners’ rights to repair their own vehicles, I briefly introduced the topic of the on-board diagnostics (OBD) port, used to monitor (and in ...

Recent articles and editorials have incorrectly implied that the new On Board Diagnostics (OBD) emissions testing program was optional for the state to implement, when in fact it is a mandatory ...

Starting early next year, 1996 and newer vehicles won’t have to pass the Illinois EPA’s treadmill emissions test that generates hundreds of damage claims annually. Instead of the dynamometer test, in ...