# Service bulletin K21134562

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: 10138732
- Published by NHTSA: 2018\-05\-29
- Manufacturer's number: K21134562
- Manufacturer's date: 2018\-04\-25
- NHTSA component: ENGINE AND ENGINE COOLING:ENGINE:DIESEL; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM

## NHTSA's summary

Selective Catalytic Reduction \( SCR \) Efficiency And Diesel Exhaust Fluid \( DEF \) Dosing Valve Diagnostic Trouble Codes \( DTC \) P208E, P103C, P0422, P20EE, P207F, P225E; Dosing Valve Diagnostic Information TO BE USED BEFORE DEF DOSING VALVE REPLACEMENT \- OBD13 And Newer Emissions \(Commonly Model Year 2014 And Newer\)

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2018/MC-10138732-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2018/MC-10138732-0001.pdf)

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

## Components

Engine, Exhaust and emissions

## Trouble codes named

P0422, P103C, P207F, P208E, P20EE, P225E

## Vehicles listed

- MACK MACK

JSON: [/v1/bulletins/10138732](/v1/bulletins/10138732)

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