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Service bulletins for the 2015 Infiniti Q50

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

207 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
ITB17-042E2022-03-12. Service bulletin. 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.
ITB13-044J2022-03-12. Service bulletin. FUEL SYSTEM, OTHER; 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.
ITB13026E2021-05-10. Service bulletin. ELECTRICAL SYSTEM:ADAS:AUTONOMOUS/SELF DRIVING:SOFTWARE; ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION:FILTER/SCREEN. SERVICE INFORMATION If the Display Control Unit (DCU) needs to be replaced on an Applied Vehicle for any reason, follow the steps in the Service Procedure of this bulletin. See this bulletin for further detail.
ITB160142021-05-10. Service bulletin. ENGINE AND ENGINE COOLING. IF YOU CONFIRM The MIL is ON with P0116 Engine Coolant Temperature (ECT SENSOR) stored, and There are no drivability issues. ACTION 1. Refer to step 6 in the SERVICE PROCEDURE to confirm if ECM reprogramming applies. 2. If it applies, reprogram the ECM. See this bulletin for further detail.
ITB11011A2021-05-10. Service bulletin. POWER TRAIN; ENGINE AND ENGINE COOLING; EQUIPMENT. SERVICE INFORMATION For QX60 Hybrid Vehicles, go to page 4. Q50, Q70, and M35 Hybrid Vehicles The internal combustion (IC) engine in the Q50, Q70, and M35 Hybrid vehicles is started using a high voltage motor that is integrated into the transmission. The high voltage motor gets its power from the high voltage Lithium-Ion (Li-ion) battery that is mounted between the trunk room and the rear seat. The Li-ion battery cannot be recharged using an external battery charger; therefore it is very important that the battery state of charge (SOC) is properly maintained during extended storage periods. Action must to be taken in order to prevent excessive discharge of the high voltage Li-ion battery during an extended storage period. If the reserve capacity of the Li-ion battery is not sufficient, the hybrid system cannot be started. Perform the Battery Discharge Prevention During Extended Storage procedure in this bulletin once a month (every 30 days). NOTE: A discharged high voltage Li-ion battery is not a warrantable issue. See this bulletin for further detail.
ITB13054D2021-05-10. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM). IF YOU CONFIRM: The MIL is ON with DTC P0101 and/or P010B (MAF SEN/CIRCUIT-B1/B2) and there are no drivability issues. ACTION: 1. Refer to step 6 in the SERVICE PROCEDURE to confirm this bulletin applies to the vehicle you are working on. 2. If this bulletin applies, reprogram the ECM. NOTE: If this bulletin does apply (the ECM needs to be reprogrammed), do NOT replace the mass air flow sensor(s). See this bulletin for further detail.
ITB150042021-05-10. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE. IF YOU CONFIRM: The MIL is ON after the engine has been idling a while and one or both of the following DTCs are found stored in the ECM: - P0171 (FUEL SYS-LEAN-B1) - P0174 (FUEL SYS-LEAN-B2) ACTION: 1. Confirm this bulletin applies. - Compare the vehicle?s current ECM part number to those listed in Table A (see page 5). 2. If the ECM part number does not match one listed in Table A, this bulletin does not apply. Go back to ASIST for further diagnostic and repair information. 3. If this bulletin applies, reprogram the ECM. See this bulletin for further detail.
ITB140562021-05-10. Service bulletin. ENGINE; ELECTRICAL SYSTEM. SERVICE INFORMATION Starting with 2010 Model Year, Infiniti vehicles have been gradually incorporating a new type of DTC known as Permanent DTC or P-DTC. If a vehicle is equipped with P-DTCs, all emission related DTCs will also set a P-DTC if the MIL is turned ON. A listing of which DTCs that will also set a P-DTC is found in the DTC Index in the EC-Engine Control section of the Electronic Service Manual (ESM). If a DTC repair is performed and the DTC erased, a vehicle may fail an Emission Inspection and Maintenance test if the P-DTC is not also erased. See this bulletin for further detail.
ITB16-008C2021-05-07. Service bulletin. ENGINE AND ENGINE COOLING. MIL ON WITH P0603 STORED FOR ECM BACK UP CIRCUIT This bulletin has been amended. See AMENDMENT HISTORY on page 3. Please discard previous versions of this bulletin.
ITB17-042D2021-04-13. Service bulletin. 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.
ITB15-024a2021-01-09. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM). 2005-2015 INFINITI VEHICLES; ECM REPROGRAMMING SERVICE INFORMATION This bulletin is no longer active. Please discard previous versions of ITB15-024.
ITB17-042b2019-02-19. Service bulletin. 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.
ITB13-044g2019-02-19. Service bulletin. 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.
Revision 1-IEVAP2019-01-07. Service bulletin. ENGINE; EQUIPMENT. OBD II EVAP Tube Warranty Enhancement The update below was sent out to Regions and Retailers in August of this year. We are re-circulating this update to make regional and retailer personnel aware that we are re-notifying clients at this time.
Revision 1-NEVAP2018-10-01. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. OBD II EVAP Tube Warranty Enhancement UPDATE August 17, 2018 Please discard earlier versions of this bulletin. The announcement from March 21, 2017 has been revised to include: - Clarification that the refueling concern is extremely hard to fill, not intermittent, and occurs at multiple fueling stations and fuel pumps - Customer expense may be applicable if the vehicle is out of warranty
Revision 1-IEVAP2018-10-01. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. OBD II EVAP Tube Warranty Enhancement UPDATE August 17, 2018 Please discard earlier versions of this bulletin The announcement from March 21, 2017 has been revised to include: o Clarification that the refueling concern is extremely hard to fill, not intermittent, and occurs at multiple fueling stations and fuel pumps o Client expense may be applicable if the vehicle is out of warranty
ITB18-0222018-09-17. Service bulletin. ELECTRICAL SYSTEM; ENGINE; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. 2014 ? 2017 Q50 HYBRID; ENGINE STOPS RUNNING IN EXTREMELY HOT AMBIENT TEMPERATURES AND DTC P3182 STORED IF YOU CONFIRM Engine stops running in extremely hot ambient temperatures (greater than 110 degrees Fahrenheit) and DTC P3182 HV BATTERY SYSTEM is stored. ACTION 1. Refer to step 14 in the SERVICE PROCEDURE to see if this bulletin applies to the vehicle you are working on. 2. If this bulletin applies, reprogram the Hybrid Powertrain Control Module (HPCM).
ITB13-052b2018-05-07. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ENGINE. INTELLIGENT KEY NOT DETECTED / ENGINE WILL NOT START This bulletin has been amended to update the Applied Vehicles. No other changes were made. Please discard previous versions of this bulletin.
ITB16-0472017-10-15. Service bulletin. ENGINE. INFINITI; DIAGNOSIS INFORMATION FOR ABS DTC C1130 SERVICE INFORMATION When diagnosing for DTC C1130 (ENGINE SIGNAL): ECM related DTCs (P-codes) must be diagnosed, repaired, and DTCs erased first. - DTC C1130 is an ABS DTC that indicates an output signal of the ECM is not recognized. - Absent or incorrect ECM signals, that are indicated by corresponding P-codes, may trigger C1130 in the ABS control unit. - Some vehicle features that can be affected by absent or incorrect ECM signals are: - Forward Emergency Braking (FEB) - Intelligent Cruise Control (ICC) - VDC/ABS/TCS
ITB16-037b2017-10-15. Service bulletin. ENGINE AND ENGINE COOLING. 2014-2016 Q50; AIR MIX DOOR MOTOR LH SERVICE INFORMATION This bulletin has been amended throughout. Discard all previous versions of this bulletin.
ITB13-052a2017-10-15. Service bulletin. ENGINE. INTELLIGENT KEY NOT DETECTED / ENGINE WILL NOT START This bulletin has been amended to update the Applied Vehicles and make changes to the body of the bulletin. Please discard previous versions.
ITB17-042a2017-09-14. Service bulletin. 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.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.