# Service bulletin ITB22\-042

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.

- Type: Service bulletin
- NHTSA id: 10229604
- Published by NHTSA: 2023\-01\-10
- Manufacturer's number: ITB22\-042
- Manufacturer's date: 2022\-12\-06
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

MIL ON WITH DTC P0448 STORED IN THE ECM IF YOU CONFIRM The MIL is ON with DTC P0448 \(VENT CONTROL VALVE\) stored in the ECM. ACTION See Repair Overview on page 2 for diagnostic procedure.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-10229604-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-10229604-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Trouble codes named

P0448

## Vehicles listed

- 2021 to 2023 INFINITI QX50
- 2022 to 2023 INFINITI QX55

## Recalls for the same vehicles and component

- [2025356](/recalls/tc/2025356.md), 2025-06-27: Engine
- [25V437000](/recalls/nhtsa/25V437000.md), 2025-06-27: ENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL

## Other bulletins for the same vehicles and component

- [ITB22\-025B](/bulletins/10246430.md), 2023-12-08, Service bulletin: VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM; ENGINE AND ENGINE COOLING. 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.
- [ITB22\-025A](/bulletins/10222710.md), 2022-10-07, Service bulletin: ENGINE AND ENGINE COOLING; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. 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.
- [ITB21\-027A](/bulletins/10208941.md), 2022-03-12, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE; ENGINE AND ENGINE COOLING. MIL ON WITH DTC P11A7 STORED IN THE ECM This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
- [ITB17\-042E](/bulletins/10208936.md), 2022-03-12, 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\-044J](/bulletins/10208932.md), 2022-03-12, 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.
- [ITB14\-011F](/bulletins/10207847.md), 2022-02-10, Service bulletin: ELECTRICAL SYSTEM; ENGINE. REMOTE ENGINE START NOT WORKING This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
- [ITB21\-007](/bulletins/10191928.md), 2021-05-07, Service bulletin: ENGINE AND ENGINE COOLING. MIL ON WITH DTC P062F AND/OR P0603 STORED IF YOU CONFIRM The MIL is ON and DTC P062F \(EEPROM\) and/or P0603 \(ECM BACK UP/CIRCUIT\) is stored, And The customer stated the vehicle was recently started after sitting for an extended period of time \(i.e., the battery voltage was low while attempting to start the engine\). ACTION 1. Test the vehicle’s 12 volt battery using the Midtronics DSS\-5000. Recharge or replace the battery if necessary. 2. Erase all DTCs.
- [ITB17\-042D](/bulletins/10190187.md), 2021-04-13, 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.

JSON: [/v1/bulletins/10229604](/v1/bulletins/10229604)

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