DTCS P0442 Or P0455: EVAP System Leak - Small Leak/Gross Leak: Condition
WARNING: This page is about a different car, the 2003 Suzuki XL-7. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0442 is set when fuel tank pressure increase exceeds a predetermined value. MIL is illuminated when ECM detects malfunction during 2 consecutive drive cycles.
DTC P0455 is set when difference between minimum and maximum fuel tank internal pressure is less than specified. MIL is illuminated when ECM detects malfunction during 2 consecutive drive cycles.