Engine Error
P0440
Evaporative Emission System Malfunction
Severity
Low
Symptoms
Check engine light, failed emissions test
Common Causes
- Faulty gas cap
- Leaking fuel tank
- Cracked charcoal canister
- Broken EVAP hose
How to Fix
- 1 Replace gas cap
- 2 Inspect EVAP hoses
- 3 Perform smoke test
- 4 Replace canister
Estimated Repair Cost
USD
$25
–
$800
Gas cap: $25; Charcoal canister: $300 - $600