Vent Valve — Nissan Gravite
Category: Fuel System | Severity: medium | Cost: ₹1,500–₹4,000
What is Vent Valve?
Regulates air flow into EVAP system to maintain pressure balance.
How Vent Valve Works
Opens to allow fresh air into the system during purge cycles.
Why is Vent Valve Important?
Maintains system pressure and prevents vacuum lock.
Common Problems
- Blockage
- Valve failure
Symptoms
- Fuel tank pressure issues
- Check engine light
Causes of Failure
- Dust ingress
- Electrical fault
Impact on Car Performance
Improper pressure affects fuel system efficiency.
DIY Fix Guide — Step by Step
- Inspect valve
- Clean blockage
- Replace if faulty
Maintenance Tips
- Keep vent lines clean
Replacement Cost in India
Estimated range: ₹1,500 – ₹4,000
Where to Buy Online
When to Replace Vent Valve
Replace if airflow is blocked or valve fails.