P0456 on Infiniti vehicles A very small leak in the evaporative emissions system
P0456 is named on 48 Infiniti model years (2016–2026): 322 manufacturer filings and 0 owner reports in NHTSA’s files, across QX60, Q50, Q70, QX30, QX50 and 4 more.
Which Infiniti model years name P0456
Source: NHTSA manufacturer communications and complaintsA model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.
Infiniti filings that name P0456
Source: NHTSA manufacturer communicationsBulletins and campaigns Infiniti filed with NHTSA whose summary names P0456. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- ITB17-042a Service bulletin2017-08-21 · Engine And Engine Cooling — Exhaust System — Emission Control — Gas Recirculation Valve (Egr Valve)
- INFINITI; DTC P0456 CAUSED BY EVAP LEAK AT VENT CONTROL VALVE O-RING This bulletin has been amended. The APPLIED VEHICLES and CLAIMS INFORMATION sections have been revised. No other changes have been made. Please discard previous versions of this bulletin.
- ITB17-042 Service bulletin2017-07-21 · Service Brakes, Air — Supply — Check Valve
- INFINITI; DTC P0456 CAUSED BY EVAP LEAK AT VENT CONTROL VALVE O-RING IF YOU CONFIRM The MIL is ON in an APPLIED VEHICLE with DTC P0456 (EVAP VERY SML LEAK) AND - DTC P0456 is not caused by a loose fuel fill cap (refer to ITB13-044). - An EVAP leak has been detected where the vent control valve mounts to the canister. - The vent control valve O-ring seal is determined to be the cause. ACTI
- ITB13-044f Service bulletin2018-08-15 · Fuel System, Gasoline
- ALL MODEL YEAR 2012 AND NEWER INFINITI VEHICLES; EVAP LEAK DTC P0442, P0455, P0456 INFORMATION This bulletin has been amended. The publication date has been revised to include the latest models and model years, and the Service Procedure has been updated. Please discard previous versions of this bulletin.
- ITB13-044g Service bulletin2019-01-29 · Engine And Engine Cooling
- ALL MODEL YEAR 2012 AND NEWER INFINITI VEHICLES; EVAP LEAK DTC P0442, P0455, P0456 INFORMATION This bulletin has been amended. See Amendment History on the last page. Please discard previous versions of this bulletin.
- ITB17-042b Service bulletin2019-01-29 · Engine And Engine Cooling
- INFINITI; DTC P0456 CAUSED BY EVAP LEAK AT VENT CONTROL VALVE O-RING This bulletin has been amended. See Amendment History on the last page. Please discard previous versions of this bulletin.
- ITB17-042c Service bulletin2020-09-14 · Equipment
- INFINITI; DTC P0456 CAUSED BY EVAP LEAK AT VENT CONTROL VALVE O-RING This bulletin has been amended. See Amendment History on the last page. Please discard previous versions of this bulletin.
- ITB17-042D Service bulletin2021-03-01 · Engine And Engine Cooling
- INFINITI; DTC P0456 CAUSED BY EVAP LEAK AT VENT CONTROL VALVE O-RING This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
- ITB13-044J Service bulletin2022-02-07 · Engine And Engine Cooling
- EVAP LEAK DTC P0442, P0455, P0456 INFORMATION This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
- ITB17-042E Service bulletin2022-02-07 · Engine And Engine Cooling
- DTC P0456 CAUSED BY EVAP LEAK AT VENT CONTROL VALVE O-RING This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
- ITB26-002 Service bulletin2026-02-02 · Fuel/Propulsion System
- FUEL FILLER TUBE LOWER SEAL IS LEAKING AND DTC P0456 IS STORED IN THE ECM IF YOU CONFIRM The vehicle has a visible leak with a smoke machine test coming from the fuel filler tube lower seal, AND DTC P0456 is stored as “Active”, “Past”, or “Pending” in the ECM. ACTION 1. Remove the supplied funnel from the rear of the vehicle or trunk. 2. Insert the funnel completely in the fuel filler tube and rem
- ITB26-002A Service bulletin2026-05-01 · Fuel/Propulsion System
- FUEL FILLER TUBE LOWER SEAL IS LEAKING AND DTC P0456 IS STORED IN THE ECM This bulletin is no longer active. Please discard previous versions of ITB26-002.
What P0456 means
Source: SAE J2012 / OBD-IIA very small leak in the evaporative emissions system.
A stored code names the test that failed, never the part that caused it. The record above is what Infiniti and its owners have filed about it; the code’s page across every make has the whole file.
Common questions
Source: NHTSA files and the OBD-II standardIs P0456 a known problem on Infiniti vehicles?
It is a documented one: NHTSA's files hold 322 manufacturer filings and 0 owner reports naming P0456 on 48 Infiniti model years (2016–2026). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.
Which Infiniti models does P0456 appear on most?
2017 QX60 (18 documents), 2016 QX60 (18 documents), 2016 Q50 (16 documents).
Does P0456 on a Infiniti mean it is recalled?
No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.