What does p0442 code mean on the chevy equinox?

The P0442 code for the Chevy Equinox means that a evap system leak has been detected. A loose fuel cap is the most common cause that triggers the p0442 code. A Leak or damage in the EVAP system line or a leak or damage in the charcoal canister can also cause this code. A damaged or clogged charcoal canister will prevent fuel vapors from being purged. Signs of a failing charcoal canister are that the check engine light is on. If the car's computer finds an EVAP system leak, including one from a cracked charcoal canister, it will turn on the check engine light.