# Service bulletin KC\-740

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: 10215321
- Published by NHTSA: 2022\-07\-05
- Manufacturer's number: KC\-740
- Manufacturer's date: 2022\-06\-06
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

Mack Chassis \- Diagnostic Trouble Code \(DTC\) P20EE \- SCR NOx Catalyst Efficiency Below Threshold \(Bank 1\) \- US17\+OBD2019 And Newer Emissions

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-10215321-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-10215321-9999.pdf)

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

## Components

Engine

## Trouble codes named

P20EE

## Vehicles listed

- MACK MACK

JSON: [/v1/bulletins/10215321](/v1/bulletins/10215321)

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