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Service bulletin ITB19-012a

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10168888
Published by NHTSA2019-12-06
Manufacturer's numberITB19-012a
Manufacturer's date2019-11-14
NHTSA componentENGINE; EQUIPMENT

NHTSA's summary

MIL ON WITH DTC P0448 This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine, Equipment and accessories

Trouble codes named

P0448

Vehicles listed
INFINITI Q502019
INFINITI Q602019
INFINITI QX502019

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20253562025-06-27. Engine
25V4370002025-06-27. ENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
ITB22-038D2025-02-10. Service bulletin. TURBOCHARGER REPLACEMENT PROCEDURE APPLIED ENGINES: VR30DDTT IF YOU CONFIRM One or both turbochargers require replacement. ACTION 1. Replace the affected turbocharger(s). • Refer to the SERVICE PROCEDURE in this bulletin for the updated procedure. IMPORTANT: You MUST closely follow the entire SERVICE PROCEDURE as it contains information that is essential to successfully completing this repair. 2. Refer to step 212 in the SERVICE PROCEDURE to confirm if the ECM needs to be reprogrammed. • 2016-2024 Q50 and 2017-2021 Q60 will require ECM reprogramming at the end of this SERVICE PROCEDURE. 3. If the ECM part number is in Table A (page 61 and 63), reprogram the ECM. IMPORTANT: The purpose of ACTION (above) is to give you a quick idea of the work you will be performing. You MUST closely follow the entire SERVICE PROCEDURE as it contains information that is essential to successfully completing this repair.
ITB23-010E2024-03-08. Service bulletin. SOFTWARE UPDATE FOR INFOTAINMENT ISSUES This bulletin is no longer active. To access infotainment software updates via the Infotainment Software Update Utility: Select SPECIALTY TOOLS, and then select Infotainment Software Updates on the left side of ASIST. Please discard previous versions of ITB23-010.
ITB23-010D2024-02-08. Service bulletin. SOFTWARE UPDATE FOR INFOTAINMENT ISSUES This bulletin is no longer active. To access infotainment software updates via the Infotainment Software Update Utility: Select SPECIALTY TOOLS, and then select Infotainment Software Updates on the left side of ASIST. HINT: Initially, the Infotainment Software Update Utility will be available only on the CONSULT PC version of ASIST. The Utility will be added to ASIST WEB at a later date. Please discard previous versions of ITB23-010.
ITB12-011Q2024-02-08. Service bulletin. TELEMATICS SERVICE INFORMATION This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
ITB22-038C2023-12-08. Service bulletin. TURBOCHARGER REPLACEMENT PROCEDURE This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
ITB22-025B2023-12-08. Service bulletin. ROARING NOISE FROM THE ENGINE COOLING FAN ASSEMBLY AND THE A/C IS NOT COOLING This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
ITB23-010C2023-09-08. Service bulletin. SOFTWARE UPDATE FOR INFOTAINMENT ISSUES This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
ITB23-010B2023-09-08. Service bulletin. SOFTWARE UPDATE FOR INFOTAINMENT ISSUES This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
ITB22-038B2023-09-08. Service bulletin. TURBOCHARGER REPLACEMENT PROCEDURE This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
REV2 R22D1 Q50_Q2023-07-11. Service bulletin. ISS Reprogram Voluntary Emission Recall Campaign REVISED June 14, 2023 Please discard earlier versions of this bulletin. The announcement from June 10, 2023 has been revised to include the following: • INFINITI has expanded the investigation of a potential issue with the repair remedy to include model years 2018-2019 Q50 and Q60 vehicles. • Repairs on all vehicles are temporarily suspended while INFINITI investigates the remedy. • As a result, all vehicles affected by this campaign will be temporarily deactivated in Service Comm and National Service History. • An update will be provided at a later date • If there are claim processing concerns, email the FQA mailbox: FQA_Inspection_Support@nissan-usa.com