Ten of Air Care Colorado's locations have reopened for emissions testing with extensive safety procedures in place.

The testing procedure involves inserting a sensor in the tailpipe. With a newer-model vehicle, the testing computer is plugged directly into the on-board diagnostic system computer.

The Obama administration is stepping up its game to see if more car companies are evading emissions-testing standards. The head of EPA's Transportation and Air Quality office, Chris Grundler, said ...

The testing procedure involves placing a car inside a semi-anechoic chamber, which sealed off from outside electromagnetic emissions to ensure accurate test results.

The results discussed in this paper are a statistical comparison of the CDH-226 with Federal Test Procedure results. The CDH-226 shows a high positive mathematical correlation to the FTP for ...

In a report by BBC, Volkswagen said it is having difficulty coping with the new emission testing procedure and plans to temporarily stop production of some diesel platforms. The automaker will ...

A drive cycle is a standardized testing procedure used to measure the performance of a vehicle's onboard diagnostic (OBD) system. It is used to evaluate the performance of the engine, transmission, ...