What does code P1440 mean on Infiniti vehicles?
The ECU detects a small leak in the evaporative emission control system under positive pressure testing.
OBD-II Code Infiniti
P1440 — Infiniti — EVAP Small Leak Detected Positive Pressure
The ECU detects a small leak in the evaporative emission control system under positive pressure testing.
Common symptoms
- Check engine light on
Possible causes
- Loose fuel cap
- cracked EVAP hoses
- minor leaks
Initial recommendation
Inspect fuel cap sealing and EVAP hoses for leaks.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
Use the app to combine Infiniti code P1440 with your vehicle's actual symptoms for more complete diagnostic guidance.
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