DTC P0442: EVAP Emission Control System Leak Detected (Small Leak) & DTC P0456: EVAP Emission Control System Leak Detected (Very Small Leak): Notes

CAUTION: If Engine Control Module (ECM) replacement is instructed in following test, always ensure ECM connectors and ground circuits are okay. If either are defective, repair and repeat testing to confirm ECM malfunction.

NOTE: This DTC may be caused by a loose or improperly installed fuel tank cap. If DTCs P0441, P0446, P0451, P0452 or P0453 is output with DTC P0442 or DTC P0456, perform appropriate test for these DTCs first before performing test for DTC P0442 or DTC P0456.