What might cause my 2015 Chevy Trax check engine light to come on?

The 2015 Chevy Trax' check engine light may illuminate due to a loose gas cap. When tightened, the light will go off. Drive the car for at least 15-20 minutes above 25 mph. If You've been starting and stopping excessively, the catalytic converter may be stressed and driving at highway speeds should clear the CEL. An O2 sensor often needs to be replaced if You suddenly notice a drop in fuel economy. It's responsible for monitoring the amount of unburned oxygen in the exhaust and conversely provides a key piece of data to the engine's combustion system in deterMINIng its air/fuELRatio. In general, the CEL warning is indicating there's an issue with the transmission, O2 sensors or spark plugs and get the Trax diagnosed by professionals.