DTC P0440 — EVAP Emission Control System
P0440 indicates: EVAP Emission Control System.
Diagnostic summary
P0440
What it means
EVAP Emission Control System
Can you drive?
✅ Safe to drive
Urgency
Low 3/10
Typical price
$20 – $400
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Updated Jun 12, 2026 Seen on Powertrain
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ℹ️ What does it mean?
EVAP Emission Control System
🔍 Symptoms
- • Check Engine Light on
- • Reduced engine performance
- • Increased fuel consumption
- • Unusual engine behavior
⚠️ Possible Causes
- ⚠ Loose gas cap
- ⚠ Faulty EVAP canister
- ⚠ Purge valve failure
- ⚠ Leak in EVAP system
🚗 Can I drive with this code?
Safe to drive
Generally safe to drive. Fix at your convenience.
🔧 How to Diagnose
- 1 Read DTCs with OBD-II scanner
- 2 Check freeze frame data
- 3 Inspect related components
- 4 Clear codes and test drive
🛠️ How to Fix
- 1 Tighten or replace gas cap
- 2 Replace EVAP canister
- 3 Replace purge valve
- 4 Fix leaks
💰 Estimated Repair Cost
Repair cost by car / region
Early rough estimate. Accuracy improves as more real repair stories are added.
DIY / parts$7 – $260
Mechanic / labor$9 – $300
Repair range$20 – $400
❓ FAQ
What does P0440 mean?
EVAP Emission Control System
How serious is P0440?
Severity: low. Generally safe to drive. Fix at your convenience.
How much does it cost to fix P0440?
Estimated repair cost: $20–$400 depending on vehicle and region.
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