2012 Infiniti P0455: What It Means & Is It Safe to Drive?
P0455 on the 2012 Infiniti: Evaporative Emission System Leak Detected (Large Leak). Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
PowertrainMedium urgency
What this code means
A large leak has been detected in the EVAP system. Could be gas cap left off, disconnected hose, or damaged canister.
Common causes on the 2012 Infiniti
- Gas cap missing or not sealed
- Disconnected or ruptured EVAP hose
- Damaged charcoal canister
- Faulty purge/vent solenoid
Symptoms
- Check Engine Light
- Fuel smell possible
Typical fixes
- Install or replace gas cap
- Inspect and repair EVAP hoses
- Replace canister or valves as needed
Repair cost range
For a 2012 Infiniti, repairs for P0455 typically fall between $20 and $500, depending on the root cause and labor rates in your area.
Known issues on Infiniti
Infiniti P0455 follows Nissan's diagnosis—gas cap first. On FX and QX models, the EVAP canister is mounted behind the rear wheel and exposed to road debris; inspect it for cracks. A gross EVAP leak on high-mileage G37 is often the large tank vent hose.
Most commonly affected models
FX35/FX50 2003–2013QX56 2004–2010G37 2008–2013