Infiniti DTC P1440 – EVAP Control System (Small Leak) (Positive Pressure)
DTC P1440 meaning on Infiniti
DTC P1440 on an Infiniti refers to the Evaporative Emission Control System (EVAP) small leak detected with positive pressure. This code indicates that there is a small leak in the EVAP system, which is responsible for capturing and storing fuel vapors to prevent them from escaping into the atmosphere.
Infiniti DTC P1440 symptoms
Symptoms of DTC P1440 on an Infiniti may include:
- Check Engine Light illuminated on the dashboard
- Strong fuel odor near the vehicle
- Decreased fuel efficiency
Infiniti DTC P1440 causes
Common causes of DTC P1440 on an Infiniti include:
- Loose or damaged gas cap
- Leaking EVAP system hoses or connections
- Faulty EVAP canister purge valve
- Cracked or damaged charcoal canister
Infiniti DTC P1440 seriousness
While DTC P1440 is not typically a serious issue that affects the drivability of the vehicle, it should be addressed promptly to prevent environmental pollution and ensure proper operation of the EVAP system.
How to diagnose DTC P1440 on Infiniti
To diagnose DTC P1440 on an Infiniti, a mechanic may perform the following steps:
- Inspect the gas cap for proper sealing
- Check EVAP system hoses and connections for leaks
- Test the EVAP canister purge valve for proper operation
- Inspect the charcoal canister for cracks or damage
How to fix DTC P1440 on Infiniti
To fix DTC P1440 on an Infiniti, the following steps may be taken:
- Tighten or replace the gas cap if it is loose or damaged
- Repair or replace any leaking EVAP system hoses or connections
- Replace the faulty EVAP canister purge valve
- Replace the cracked or damaged charcoal canister
How to erase DTC P1440 on Infiniti
After fixing the underlying issue causing DTC P1440 on an Infiniti, the code can be erased using a diagnostic scanner or by disconnecting the vehicle’s battery for a few minutes to reset the system.
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