Checking Evaporative Emission System

Tests 617 - 620:

SYMPTOM
CHECKING EVAPORATIVE EMISSION SYSTEM

POSSIBLE CAUSES
- Proportional purge solenoid vacuum supply defective
- Purge hose defective (canister to fuel tank)
- Purge hose defective (solenoid to canister)
- EVAP canister defective
- Proportional purge solenoid defective