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Service bulletin 167-B1704-02

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 id10115990
Published by NHTSA2017-08-25
Manufacturer's number167-B1704-02
Manufacturer's date2017-01-23
NHTSA componentELECTRICAL SYSTEM:SOFTWARE

NHTSA's summary

SB?17?004 Enhanced engine ECU (Electronic Control Unit) software has been made available to address the following conditions: Engine torque reduction has been increased to 70%, from an original 50%, when the engine ECU detects a P244B ? Incomplete Regeneration, in conjunction with the soot level indicator in the instrument cluster reaching 10 bars. Detection threshold change for DTC (Diagnostic Trouble Code)P20DF ? Aftertreatment Fuel Injection Line Pressure Sensor Signal Too Low. PTO (Power Take Off) control updates. ? Enable DPR (Diesel Particulate Reduction) auto regeneration during PTO operation. ? Engine speed will be increased to "Preset PTO engine speed 2" when idle up signal is provided to "PTO SWITCH 2".

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

Electrical system, Software

Trouble codes named

P20DF, P244B

Vehicles listed
HINO CONVENTIONAL MODELS2011 to 2019

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