Infiniti QX50 2021–2023 — technical service bulletin
Bulletin ITB22-042 · NHTSA communication 10229604 · issued Dec 6, 2022
Technical service bulletin
communication type
Engine and Engine Cooling
component
2021–2023
model years
5
vehicle entries
Official 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.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.