The most common cause for the P1440 code is a loose or missing fuel filler cap. Resecure or install the cap and reset the engine light. In some cases, the light will turn off by itself after a few days of driving the vehicle. if the problem persists replaced the gas cap.
⚠ Does your Infiniti have Safety Recalls? → Check here
How to Fix the DTC P1440 Infiniti?
Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Search for P1440 Infiniti Questions and Answers: Search here →
What is the Cost to Diagnose the Code?
Labor: 1.0
The cost to diagnose the P1440 Infiniti code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.
When is the Code Detected?
When EVAP control system has a leak, EVAP control system does not operate properly
What are Code Possible Symptoms?
Engine Light ON (or Service Engine Soon Warning Light)
Fuel smell
What Does the P1440 Infiniti Code Mean?
This diagnosis detects leaks in the Evaporative Emission (EVAP) purge line using vapor pressure in the fuel tank. The EVAP canister vent control valve is closed to shut the EVAP purge line. The vacuum cut valve bypass valve will then be opened to clear the line between the fuel tank and the EVAP canister purge volume control solenoid valve. The EVAP control system pressure sensor can now monitor the pressure inside the fuel tank. If pressure increases, the Engine Control Module (ECM) will check for leaks in the line between the vacuum cut valve and EVAP canister purge volume control solenoid valve.
P1440 Infiniti Code - Evaporative Emission Control System Small Leak