# Service bulletin 167\-T1423\-12

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: 10117726
- Published by NHTSA: 2017\-09\-14
- Manufacturer's number: 167\-T1423\-12
- Manufacturer's date: 2014\-10\-31
- NHTSA component: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; FUEL SYSTEM, DIESEL

## NHTSA's summary

TT\-14\-026 When diagnosing a concern with the SCR system, the technician may notice crystallized DEF \(diesel exhaust fluid\) on the tip of the DEF injector. Crystallized DEF on the tip of the injector is a normal occurrence and does not indicate that the injector nozzle is clogged. The crystallization will dissolve when the injector is activated. Do not replace the DEF injector for the crystallization alone. Please follow Workshop Manual diagnostics to diagnose the specific condition or DTC on the vehicle.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2014/MC-10117726-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2014/MC-10117726-0001.pdf)

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

## Components

Engine, Exhaust and emissions, Fuel system

## Vehicles listed

- 2011 to 2015 HINO CONVENTIONAL MODELS

JSON: [/v1/bulletins/10117726](/v1/bulletins/10117726)

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