Public Investigator asked the Department of Transportation why tests are still required, and what options exist for people ...

There's a lot going on inside your vehicle at any given time, whether you're idling at a red light or driving at freeway speeds. Much of this activity involves chemical reactions that — while ...

A recent study indicates that the “particulate matter” released from brake pads might be more harmful to lung health than emissions from diesels.

If you've taken a close look at the shiny exhaust tips on some new cars, you may have noticed that there isn't anything ...

Islamabad has launched a large-scale vehicle emission testing campaign in collaboration with Punjab EPA, using advanced ...

Vehicles with up to 6% carbon monoxide emissions will be cleared. Those exceeding this limit will get a warning.

California has deployed emissions monitoring devices to monitor the exhaust of heavy-duty vehicles as they pass and flag potential violators of emissions regulations.

It directs the hot exhaust gases back into the combustion chambers, which makes fuel easier to burn. It also reduces emissions. A clogged or failing EGR can make your car’s check engine light ...

The Honda Pilot is a durable SUV, but it’s not immune to mechanical errors. Find out what the emissions system warning light means and what to do about it.

Colorado drivers used to waiting in long lines for their required emissions tests will have a new, hopefully more convenient option in 2026: self-serve kiosks open 24 hours a day. The kiosk plan ...

Mandatory vehicle safety inspections are no longer required for many Texas drivers, but Travis and Williamson counties still require an emissions test.