Fuel Nozzle Shuts Off Intermittently or Prematurely During Fuel Fill and/or SES Lamp On with DTC P0446 EVAP Vent System Performance Set (Inspect EVAP Canister Vent Hose and Replace As Needed)

Some customers may comment on gas station fuel nozzles shutting off intermittently or prematurely during fuel fill, and/or that the Service Engine Soon (SES) lamp is illuminated with diagnostic trouble code (DTC) P0446 Evaporative Emission (EVAP) Vent System Performance set.

This condition may be caused by a partial restriction of the EVAP canister vent hose.

Inspect the EVAP canister vent hose for any restriction. If a restriction is found that resembles a ball of cotton, this may be a "spider nest." If such a restriction is found, replace the EVAP canister vent hose with a second design hose that includes a screen.

1. Inspect the EVAP canister vent hose for any restriction.

•	If no restriction is found, refer to DTC P0446 diagnostics in SI or the appropriate model year Chevrolet Equinox or Saturn VUE Service Manual to continue to diagnose the concern.

•	If any restriction is found, proceed to Step 2.

2. Replace the EVAP canister vent hose with a second design hose. Refer to "Vent Hose Replacement" procedure in SI or the appropriate model year Chevrolet Equinox or Saturn VUE Service Manual.