# Service bulletin TSB180095\-022520

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: 10188841
- Published by NHTSA: 2021\-03\-15
- Manufacturer's number: TSB180095\-022520
- Manufacturer's date: 2021\-02\-25
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

This Technical Service Bulleting describes the verification and resolution of the diesel exhaust fluid \(DEF\) system becoming contaminated with debris. DEF tanks are cleaned and DEF dosing units or intake lines are flushed or even replaced, but these actions are not performed simultaneously. Subsequent testing or operation between component cleaning causes cross contamination of previously cleaned components and repeat fault code occurrences. This is an update to a previously submitted communication.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10188841-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10188841-9999.pdf)

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

## Components

Engine

## Vehicles listed

- CUMMINS ISB6.7

JSON: [/v1/bulletins/10188841](/v1/bulletins/10188841)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20TSB180095-022520&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10188841&vehicle=Service%20bulletin%20TSB180095-022520)