Evaporative Emissions Symptom Chart: Notes

EVAPORATIVE EMISSIONS SYMPTOM CHART

Problem	Possible Cause	Action
Leakage In The Evaporative Emission (EVAP) Canister or Canister Vent Solenoid	Canister vent solenoid stuck open. Weld seam leaks. O-ring seal leaks.	See PINPOINT TEST 1: EXCESSIVE FUEL ODOR CANISTER VENT SOLENOID .
Blockage In The Evaporative Emission (EVAP) Canister Or Canister Vent Solenoid	EVAP canister blockage. Canister vent solenoid blockage. Canister vent solenoid output hose blockage.	See PINPOINT TEST 2: HISS WHEN OPENING FUEL CAP .