What does code PO442 mean on 2003 Chevy Tracker SUV?

Code PO442 on a 2003 Chevy Tracker SUV indicates a small leak in the evaporative emissions control system (EVAP). This system is responsible for preventing fuel vapors from escaping into the atmosphere. Common causes for this code include a loose or damaged gas cap, leaks in the EVAP hoses, or issues with the EVAP canister. It's advisable to inspect these components to resolve the issue and clear the code.