A very small (tight) leak in the EVAP system.
SYMPTOMS
- Check-engine light
LIKELY CAUSES
- Slightly loose gas cap
- Tiny hose or seal leak
DIAGNOSIS STEPS
- Tighten or replace the gas cap
- Smoke-test at low pressure
RELATED PARTS
- Gas cap
- EVAP seals
A very small (tight) leak in the EVAP system.