P0440
EVAP System
P0440 is an OBD-II diagnostic trouble code meaning: EVAP System. Common causes: leaky gas cap, damage to the fuel tank or evap system pipes. Estimated repair cost: $11–56.
Symptoms
- Check Engine light comes on
- Noticeable smell of gasoline near the car
- Slight reduction in engine efficiency
Causes
- Leaky gas cap
- Damage to the fuel tank or EVAP system pipes
- EVAP valve malfunction
- Broken wires to the system sensors
How to Fix
- Check the gas tank cap for leaks
- Inspect the EVAP system tubes and connections for cracks and damage.
- Check system valves for serviceability
- Scan the wiring harness for breaks
Related codes
Error P0440 by Vehicle Brand
FAQ
What does the P0440 code mean?
P0440 is an OBD-II diagnostic trouble code that indicates: EVAP System
What causes a P0440 error code?
The most common causes of P0440 include: Leaky gas cap; Damage to the fuel tank or EVAP system pipes; EVAP valve malfunction; Broken wires to the system sensors.
How do I fix a P0440 diagnostic trouble code?
To fix P0440: Check the gas tank cap for leaks. Inspect the EVAP system tubes and connections for cracks and damage.. Check system valves for serviceability. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0440?
Limited driving only, diagnose soon
How much does it cost to fix P0440?
The estimated repair cost for P0440 is $11–56. Actual cost depends on your vehicle, location, and labor rates.
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