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Service bulletin 167-B2306-1

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 id10238881
Published by NHTSA2023-07-07
Manufacturer's number167-B2306-1
Manufacturer's date2023-06-07
NHTSA componentEQUIPMENT; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM

NHTSA's summary

Some trucks built prior to May 9, 2022 may experience reduced or intermittent cooling performance from the air conditioning system. If a subject vehicle exhibits this condition, it’s likely that the refrigerant was overcharged during vehicle assembly. This procedure provides instructions for proper recovery and recharge of the refrigerant system and appropriate warranty claim application information.

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

Equipment and accessories, Glass, wipers and mirrors, Heating and air conditioning

Vehicles listed
HINO L-SERIES2022 to 2023

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